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Khokhryakova C, Shmyrov A, Mizeva I. Does Magnetic Field Influence the Surface Tension of Ferrofluid? LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:4285-4293. [PMID: 38356339 DOI: 10.1021/acs.langmuir.3c03512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Studying the physical properties of ferrofluids is a challenging task, especially when conventional experimental techniques are adapted to the presence of a magnetic field. To date, there has been no definitive understanding of how the magnetic field affects the surface energy of ferrofluid interfaces. In this study, we perform a direct experimental investigation to assess the effect of magnetic fields on the surface tension of ferrofluids. For this purpose, a modified capillary wave technique was modified for use in the presence of an external magnetic field. A decrease in the wavelength of the capillary wave was observed when the magnetic field was oriented perpendicular to the ferrofluid surface, and an increase was recorded when the magnetic field was parallel. We note that the capillary wave pattern elongates along the magnetic field force lines. The observed effect is attributed to the varying influence of the magnetic field along and across the propagating capillary wave. Analysis of the dispersion relation and evaluation of the impacts of various mechanisms influencing capillary waves revealed, that the changes in the surface tension of ferrofluids in the presence of a magnetic field are responsible for the observed behavior. It is shown that the surface tension of the MK 8-40 ferrofluid gradually increases with the applied magnetic field and reaches a grouth up to 10% in a magnetic field of ∼10 kA/m. Thus, the surface tension is found to be influenced by an external magnetic field.
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Affiliation(s)
| | - Andrey Shmyrov
- Institute of Continuous Media Mechanics UrB of RAS, ak. Koroleva 1, 614013 Perm, Russia
| | - Irina Mizeva
- Institute of Continuous Media Mechanics UrB of RAS, ak. Koroleva 1, 614013 Perm, Russia
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Liu L, Lin F, Qin C, Zhong H, Tong T, Li R, Yan H, Wang Q, Li P, Liu D, Wang C, Bao J, Wang Z. Spinning a Liquid Wheel and Driving Surface Thermomagnetic Convection with Light. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2306756. [PMID: 37819771 DOI: 10.1002/adma.202306756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/21/2023] [Indexed: 10/13/2023]
Abstract
A typical Tesla thermomagnetic engine employs a solid magnetic wheel to convert thermal energy into mechanical energy, while thermomagnetic convection in ferrofluid is still challenging to observe because it is a volume convection that occurs in an enclosed space. Using a water-based ferrofluid, a liquid Tesla thermomagnetic engine is demonstrated and reports the observation of thermomagnetic convection on a free surface. Both types of fluid motions are driven by light and observed by simply placing ferrofluid on a cylindrical magnet. The surface thermomagnetic convection on the free surface is made possible by eliminating the Marangoni effect, while the spinning of the liquid wheel is achieved through the solid-like behavior of the ferrofluid under a strong magnetic field. Increasing the magnetic field reveals a transition from simple thermomagnetic convection to a combination of the central spin of the spiky wheel surrounded by thermomagnetic convection in the outer region of the ferrofluid. The coupling between multiple ferrofluid wheels through a fluid bridge is further demonstrated. These demonstrations not only unveil the unique properties of ferrofluid but also provide a new platform for studying complex fluid dynamics and thermomagnetic convection, opening up exciting opportunities for light-controlled fluid actuation and soft robotics.
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Affiliation(s)
- Laichen Liu
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | - Feng Lin
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, Yunnan, 650091, China
- Department of Electrical and Computer Engineering, Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas, 77204, USA
| | - Chengzhen Qin
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
- Department of Electrical and Computer Engineering, Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas, 77204, USA
| | - Hong Zhong
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
- Department of Electrical and Computer Engineering, Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas, 77204, USA
| | - Tian Tong
- Department of Electrical and Computer Engineering, Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas, 77204, USA
| | - Runjia Li
- Department of Mechanical Engineering, University of Houston, Houston, Texas, 77204, USA
| | - Hongzhen Yan
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | - Qiaozhen Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | - Peihang Li
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
| | - Dong Liu
- Department of Mechanical Engineering, University of Houston, Houston, Texas, 77204, USA
| | - Chong Wang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, Yunnan, 650091, China
| | - Jiming Bao
- Department of Electrical and Computer Engineering, Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas, 77204, USA
| | - Zhiming Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China
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Ryapolov P, Vasilyeva A, Kalyuzhnaya D, Churaev A, Sokolov E, Shel’deshova E. Magnetic Fluids: The Interaction between the Microstructure, Macroscopic Properties, and Dynamics under Different Combinations of External Influences. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:222. [PMID: 38276740 PMCID: PMC10819141 DOI: 10.3390/nano14020222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/12/2024] [Accepted: 01/15/2024] [Indexed: 01/27/2024]
Abstract
Magnetic fluids were historically the first active nano-dispersion material. Despite over half a century of research, interest in these nano-objects continues to grow every year. This is due to the impressive development of nanotechnology, the synthesis of nanoscale structures, and surface-active systems. The unique combination of fluidity and magnetic response allows magnetic fluids to be used in engineering devices and biomedical applications. In this review, experimental results and fundamental theoretical approaches are systematized to predict the micro- and macroscopic behavior of magnetic fluid systems under different external influences. The article serves as working material for both experienced scientists in the field of magnetic fluids and novice specialists who are just beginning to investigate this topic.
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Affiliation(s)
- Petr Ryapolov
- Department of Nanotechnology, Microelectronics, General and Applied Physics, Faculty of Natural Sciences, Southwest State University, 50 Let Oktyabrya Street, 94, 305040 Kursk, Russia; (A.V.); (D.K.); (A.C.); (E.S.); (E.S.)
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Banerjee U, Shyam S, Mitra SK. Magnetic Control of Water Droplet Impact onto Ferrofluid Lubricated Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:4049-4059. [PMID: 36893478 DOI: 10.1021/acs.langmuir.2c03404] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Controlling the impact process of a droplet impacting a liquid film has remained a wide-open challenge. The existing passive techniques lack precise on-demand control of the impact dynamics of droplets. The present study introduces a magnet-assisted approach to control water droplets' impact dynamics. We show that by incorporating a thin, magnetically active ferrofluid film, the overall droplet impact phenomena of the water droplets could be controlled. It is found that by modifying the distribution of the magnetic nanoparticles (MNPs) present inside the ferrofluid using a permanent magnet, the spreading and retraction behavior of the droplet could be significantly controlled. In addition to that, we also show that by altering the impact Weber number (Wei), and the magnetic Bond number (Bom), the outcomes of droplet impact could be precisely controlled. We reveal the role of the various forces on the consequential effects of droplet impact with the help of phase maps. Without the magnetic field, we discovered that the droplet impact on ferrofluid film results in no-splitting, jetting, and splashing regimes. On the other hand, the presence of magnetic field results in the no-splitting and jetting regime. However, beyond a critical magnetic field, the ferrofluid film gets transformed into an assembly of spikes. In such scenarios, the droplet impact only results in no-splitting and splashing regimes, while the jetting regime remains absent. The outcome of our study may find potential applications in chemical engineering, material synthesis, and three-dimensional (3D) printing where the control and optimization of the droplet impact process are desirable.
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Affiliation(s)
- Utsab Banerjee
- Micro & Nano-scale Transport Laboratory, Waterloo Institute for Nanotechnology, Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Sudip Shyam
- Micro & Nano-scale Transport Laboratory, Waterloo Institute for Nanotechnology, Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Sushanta K Mitra
- Micro & Nano-scale Transport Laboratory, Waterloo Institute for Nanotechnology, Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
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Altmeyer SA. Ferrofluidic wavy Taylor vortices under alternating magnetic field. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2023; 381:20220121. [PMID: 36709786 DOI: 10.1098/rsta.2022.0121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 10/25/2022] [Indexed: 06/18/2023]
Abstract
Many natural and industrial flows are subject to time-dependent boundary conditions and temporal modulations (e.g. driving frequency), which significantly modify the dynamics compared with their static counterparts. The present problem addresses ferrofluidic wavy vortex flow in Taylor-Couette geometry, with the outer cylinder at rest in a spatially homogeneous magnetic field subject to an alternating modulation. Using a modified Niklas approximation, the effect of frequency modulation on nonlinear flow dynamics and appearing resonance phenomena are investigated in the context of either period doubling or inverse period doubling. This article is part of the theme issue 'Taylor-Couette and related flows on the centennial of Taylor's seminal Philosophical Transactions paper (part 1)'.
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Affiliation(s)
- Sebastian A Altmeyer
- Castelldefels School of Telecom and Aerospace Engineering Universitat Politècnica de Catalunya, Barcelona 08034, Spain
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Patel NC, Patel JR, Deheri GM. An Effect of a Porous Structure, Slip Velocity and Rosensweig’s Viscosity on the Ferrofluid Based Squeeze Film in Porous Curved Annular Plates. JOURNAL OF NANOFLUIDS 2023. [DOI: 10.1166/jon.2023.1906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An endeavor has been made to analyze porous squeeze film performance in curved annular plates considering slip velocity, Kozeny-Carman’s porous structure and Rosensweig’s viscosity in Shliomis model-based magnetic fluid lubrication. The globular sphere model of Kozeny-Carman
for porous facing is adopted here. An extension of the Einstein’s viscosity for ferrofluid proposed by Rosensweig is considered here to improve the viscosity of ferrofluid for the Shliomis model, while Beavers and Joseph’s slip model is used for evaluating the slip effect. The
pressure and load lifting capacity in dimensionless form is obtained by modifying the Reynolds equation incorporating the Rosensweig’s viscosity, Kozeny-Carman’s model-based porosity, slip and Shliomis model-based ferofluid lubrication. The graphical representation reveals that
load carrying capacity (LCC) can be increased by increasing the curvature of upper plates, volume concentration and magnetization parameter but decrease with the slip velocity, porous structure parameter and porosity parameter. This study indicates that the load-bearing capacity remains higher
as compared to the case of Einstein’s viscosity model. However, this investigation conclusively establishes that the Shliomis model goes ahead of the other two magnetic fluid flow models in overall improvement of bearing performance characteristics. Interestingly, even considerable amount
of slip may not pose a serious problem when Kozeny-Carman’s model is resorted to. This investigation reveals that this type of bearing system sustains good amount of load even in the absence of flow which does not happen in the case of conventional bearing system.
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Affiliation(s)
- Niru C. Patel
- Department of Mathematical Sciences, P. D. Patel Institute of Applied Sciences, Charotar University of Science and Technology (CHARUSAT), CHARUSAT Campus, Changa 388421, Anand, Gujarat, India
| | - Jimit R. Patel
- Department of Mathematical Sciences, P. D. Patel Institute of Applied Sciences, Charotar University of Science and Technology (CHARUSAT), CHARUSAT Campus, Changa 388421, Anand, Gujarat, India
| | - G. M. Deheri
- Department of Mathematics, Sardar Patel University, Vallabh Vidyanagar, 388120, Anand, Gujarat, India
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7
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Physicochemical properties of mixed oil-based and bilayer-stabilized magnetic fluids. CHEMICAL PAPERS 2023. [DOI: 10.1007/s11696-023-02672-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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8
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Magneto-Liquid Vibration Support for Equipment of Biomethane Production Plant. CHEMICAL AND PETROLEUM ENGINEERING 2022. [DOI: 10.1007/s10556-022-01105-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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9
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Upadhyay RV, Raj K, Parekh KH, Pisuwala MS, Jadav MH. The viscous response of ferrofluids subjected to external magnetic field. J DISPER SCI TECHNOL 2022. [DOI: 10.1080/01932691.2022.2106997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- R. V. Upadhyay
- Dr. K C Patel Research & Development Center, Charotar University of Science &Technology, Changa, Gujarat, India
| | - K. Raj
- Dr. K C Patel Research & Development Center, Charotar University of Science &Technology, Changa, Gujarat, India
| | - Kinnari H. Parekh
- Dr. K C Patel Research & Development Center, Charotar University of Science &Technology, Changa, Gujarat, India
| | - Mujiba S. Pisuwala
- Dr. K C Patel Research & Development Center, Charotar University of Science &Technology, Changa, Gujarat, India
| | - Mudra H. Jadav
- Dr. K C Patel Research & Development Center, Charotar University of Science &Technology, Changa, Gujarat, India
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Vinod S, Philip J. Thermal and rheological properties of magnetic nanofluids: Recent advances and future directions. Adv Colloid Interface Sci 2022; 307:102729. [PMID: 35834910 DOI: 10.1016/j.cis.2022.102729] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/27/2022] [Accepted: 07/03/2022] [Indexed: 01/14/2023]
Abstract
Technological advancement and miniaturization of electronic gadgets fueled intense research on nanofluids as potential candidates for cooling applications as a substitute to conventional heat transfer fluids. Among nanofluids, magnetic nanofluids, traditionally known as ferrofluids have attracted a lot of attention owing to their magnetic field tunable thermal conductivity and rheological properties due to the aggregation of the magnetic nanoparticles into chains or columns in the presence of the magnetic field. The field-induced aggregates act as low resistance pathways thereby improving thermal transport substantially. Recent studies show that ferrofluids with smaller size and narrow size distribution display significant enhancement in thermal conductivity in the presence of a magnetic field with negligible viscosity enhancement, which is ideal for effective thermal management of electronic devices, especially in miniature electronic devices. On the contrary, highly polydisperse ferrofluids containing large aggregates, show modest enhancement in thermal conductivity in the presence of a magnetic field and a huge enhancement in viscosity. The most recent studies show that magnetic field ramp rate has a profound effect on aggregation kinetics and thermal and rheological properties. The viscosity enhancement under an external stimulus impedes their practical use in electronics cooling, which warrants the need to attain a high thermal conductivity to viscosity ratio, under a modest magnetic field. Though there are several reviews on heat transfer in nanofluids and hybrid nanofluids, a comprehensive review on fundamental understanding of field-induced thermal and rheological properties in magnetic fluids is missing in the literature. This review provides a pedagogical description of the fundamental understanding of field-induced thermal and rheological properties in magnetic fluids, with the necessary background, key concepts, definitions, mechanisms, theoretical models, experimental protocols, and design of experiments. Many important case studies are presented along with the experimental design aspects. The review also provides a summary of important experimental studies with key findings, along with the key challenges and future research directions. The review is an ideal material for experimentalists and theoreticians practicing in the field of magnetic fluids, and also serves as an excellent reference for freshers who indent to begin research on this topic.
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Affiliation(s)
- Sithara Vinod
- Smart Materials Section, Corrosion Science and Technology Division, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, India; Homi Bhabha National Institute, Mumbai, India
| | - John Philip
- Smart Materials Section, Corrosion Science and Technology Division, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, India; Homi Bhabha National Institute, Mumbai, India.
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11
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The Influence of Magnetic Field and Nanoparticle Concentration on the Thin Film Colloidal Deposition Process of Magnetic Nanoparticles: The Search for High-Efficiency Hematite Photoanodes. NANOMATERIALS 2022; 12:nano12101636. [PMID: 35630858 PMCID: PMC9146261 DOI: 10.3390/nano12101636] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/09/2022] [Accepted: 05/10/2022] [Indexed: 02/01/2023]
Abstract
Hematite is considered a promising photoanode material for photoelectrochemical water splitting, and the literature has shown that the photoanode production process has an impact on the final efficiency of hydrogen generation. Among the methods used to process hematite photoanode, we can highlight the thin films from the colloidal deposition process of magnetic nanoparticles. This technique leads to the production of high-performance hematite photoanode. However, little is known about the influence of the magnetic field and heat treatment parameters on the final properties of hematite photoanodes. Here, we will evaluate those processing parameters in the morphology and photoelectrochemical properties of nanostructured hematite anodes. The analysis of thickness demonstrated a relationship between the magnetic field and nanoparticles concentration utilized to prepare the thin films, showing that the higher magnetic fields decrease the thickness. The Jabs results corroborate to influence the magnetic field since the use of a higher magnetic field decreases the deposited material amount, consequently decreasing the absorption of the thin films. The PEC measurements showed that at higher concentrations, the use of higher magnetic fields increases the JPH values, and lower magnetic fields cause a decrease in JPH when using the higher nanoparticle concentrations.
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Socoliuc V, Avdeev MV, Kuncser V, Turcu R, Tombácz E, Vékás L. Ferrofluids and bio-ferrofluids: looking back and stepping forward. NANOSCALE 2022; 14:4786-4886. [PMID: 35297919 DOI: 10.1039/d1nr05841j] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Ferrofluids investigated along for about five decades are ultrastable colloidal suspensions of magnetic nanoparticles, which manifest simultaneously fluid and magnetic properties. Their magnetically controllable and tunable feature proved to be from the beginning an extremely fertile ground for a wide range of engineering applications. More recently, biocompatible ferrofluids attracted huge interest and produced a considerable increase of the applicative potential in nanomedicine, biotechnology and environmental protection. This paper offers a brief overview of the most relevant early results and a comprehensive description of recent achievements in ferrofluid synthesis, advanced characterization, as well as the governing equations of ferrohydrodynamics, the most important interfacial phenomena and the flow properties. Finally, it provides an overview of recent advances in tunable and adaptive multifunctional materials derived from ferrofluids and a detailed presentation of the recent progress of applications in the field of sensors and actuators, ferrofluid-driven assembly and manipulation, droplet technology, including droplet generation and control, mechanical actuation, liquid computing and robotics.
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Affiliation(s)
- V Socoliuc
- Romanian Academy - Timisoara Branch, Center for Fundamental and Advanced Technical Research, Laboratory of Magnetic Fluids, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania.
| | - M V Avdeev
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie Str. 6, 141980 Dubna, Moscow Reg., Russia.
| | - V Kuncser
- National Institute of Materials Physics, Bucharest-Magurele, 077125, Romania
| | - Rodica Turcu
- National Institute for Research and Development of Isotopic and Molecular Technologies (INCDTIM), Donat Str. 67-103, 400293 Cluj-Napoca, Romania
| | - Etelka Tombácz
- University of Szeged, Faculty of Engineering, Department of Food Engineering, Moszkvai krt. 5-7, H-6725 Szeged, Hungary.
- University of Pannonia - Soós Ernő Water Technology Research and Development Center, H-8800 Zrínyi M. str. 18, Nagykanizsa, Hungary
| | - L Vékás
- Romanian Academy - Timisoara Branch, Center for Fundamental and Advanced Technical Research, Laboratory of Magnetic Fluids, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania.
- Politehnica University of Timisoara, Research Center for Complex Fluids Systems Engineering, Mihai Viteazul Ave. 1, 300222 Timisoara, Romania
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Ajith K, Pillai AS, Muthu Vijayan Enoch I, Sharifpur M, Solomon AB, Meyer J. Effect of the non-electrically conductive spindle on the viscosity measurements of nanofluids subjected to the magnetic field. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127252] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zaripov AK, Ubaidi A. Dependence of the Viscosity of Magnetic Fluids on the Concentration of Magnetic Particles, Temperature, and a Magnetic Field. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421100320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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On the ridge of instability in ferrofluidic Couette flow via alternating magnetic field. Sci Rep 2021; 11:4705. [PMID: 33633249 PMCID: PMC7907118 DOI: 10.1038/s41598-021-84175-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 02/10/2021] [Indexed: 11/23/2022] Open
Abstract
There is a huge number of natural and industrial flows, which are subjected to time-dependent boundary conditions. The flow of a magnetic fluid under the influence of temporal modulations is such an example. Here, we perform numerical simulations of ferrofluidic Couette flow subject to time-periodic modulation (with frequency \documentclass[12pt]{minimal}
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\begin{document}$$\Omega _H$$\end{document}ΩH) in a spatially homogeneous magnetic field and report how such a modulation can lead to a significant Reynolds number Re enhancement. Consider a modified Niklas approximation we explain the relation between modulation amplitude, driving frequency and stabilization effect. From this, we describe the system response around the primary instability to be sensitive/critical by an alternating field. We detected that such an alternating field provides an easy and in particular accurate controllable key parameter to trigger the system to change from subcritical to supercritical and vice versa. Our findings provide a framework to study other types of magnetic flows driven by time-dependent forcing.
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Bhandari A. Numerical study of time-dependent ferrofluid flow past a cylinder in the presence of stationary magnetic field. SN APPLIED SCIENCES 2021. [DOI: 10.1007/s42452-020-04047-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
AbstractThis work investigates time-dependent ferrofluid flow past in a cylinder in the presence of a 10 kilo-ampere per meter magnetic field. The Reynolds number is about a hundred to keep the laminar flow and it is high enough to form a von Karman vortex street. This study presents the results for the velocity distributions, pressure distributions, lift coefficient, and drag coefficient under the influence of the stationary magnetic field. These results are compared with the flow in the absence of the magnetic field. The presence of the magnetic field diminishes the velocity distributions in the flow due to magnetization force and magnetic field dependent viscosity. This reduction in the velocity reduces the average velocity in the flow and therefore the magnetic field intensity enhances the coefficients of drag and lift. In the presence of the applied magnetic field, the velocity drops from 2.19 to 1.97 m/s at t = 7 s. However, the lift coefficients enhance from 3 m2s2/kg to 3.4 m2s2/kg and the drag coefficient enhances from 0.9 to 3 m2s2/kg. The numerical simulation of the problem is obtained using the finite element method in COMSOL Multiphysics.
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Yang C, Liu Z, Yu M, Bian X. The influence of thixotropy on the magnetorheological property of oil-based ferrofluid. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114425] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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H. Siboni N, Shrivastav GP, Klapp SHL. Non-monotonic response of a sheared magnetic liquid crystal to a continuously increasing external field. J Chem Phys 2020; 152:024505. [DOI: 10.1063/1.5126398] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
- Nima H. Siboni
- Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany
| | - Gaurav P. Shrivastav
- Institute für Theoretical Physics, Technische Universität Wien, Wiedner Hauptstr. 8-10, 1040 Vienna, Austria
| | - Sabine H. L. Klapp
- Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany
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A videographic assessment of ferrofluid during magnetic drug targeting: An application of artificial intelligence in nanomedicine. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.04.022] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Dehaghani AHS, Badizad MH. Effect of magnetic field treatment on interfacial tension of CTAB nano-emulsion: Developing a novel agent for enhanced oil recovery. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.03.111] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Experimental evidence for the significant role of initial cluster size and liquid confinement on thermo-physical properties of magnetic nanofluids under applied magnetic field. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.02.086] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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22
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Krekhov A, Shliomis M. Spontaneous Core Rotation in Ferrofluid Pipe Flow. PHYSICAL REVIEW LETTERS 2017; 118:114503. [PMID: 28368644 DOI: 10.1103/physrevlett.118.114503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Indexed: 06/07/2023]
Abstract
Ferrofluid flow along a tube of radius R in a constant axial magnetic field is revisited. Our analytical solution and numerical simulations predict a transition from an initially axial flow to a steady swirling one. The swirl dynamo arises above some critical pressure drop and magnetic field strength. The new flow pattern consists of two phases of different symmetry: The flow in the core resembles Poiseuille flow in a rotating tube of the radius r_{*}<R, where each fluid element moves along a screw path, and the annular layer of the thickness R-r_{*}, where the flow remains purely axial. These phases are separated by a thin domain wall. The swirl appearance is accompanied with a sharp increase in the flow rate that might serve for the detection of the swirling instability.
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Affiliation(s)
- Alexei Krekhov
- Max Planck Institute for Dynamics and Self-Organization, 37077 Göttingen, Germany
| | - Mark Shliomis
- Department of Mechanical Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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23
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Saeedi Dehghani AH, Badizad MH. Application of CTAB Nanoemulsion in Enhanced Oil Recovery: An Experimental Investigation with Focus on Magnetic Treatment. J DISPER SCI TECHNOL 2016. [DOI: 10.1080/01932691.2016.1257389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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24
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Perspective of Fe3O4 Nanoparticles Role in Biomedical Applications. Biochem Res Int 2016; 2016:7840161. [PMID: 27293893 PMCID: PMC4884576 DOI: 10.1155/2016/7840161] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 03/25/2016] [Accepted: 04/04/2016] [Indexed: 12/30/2022] Open
Abstract
In recent years, although many review articles have been presented about bioapplications of magnetic nanoparticles by some research groups with different expertise such as chemistry, biology, medicine, pharmacology, and materials science and engineering, the majority of these reviews are insufficiently comprehensive in all related topics like magnetic aspects of process. In the current review, it is attempted to carry out the inclusive surveys on importance of magnetic nanoparticles and especially magnetite ones and their required conditions for appropriate performance in bioapplications. The main attentions of this paper are focused on magnetic features which are less considered. Accordingly, the review contains essential magnetic properties and their measurement methods, synthesis techniques, surface modification processes, and applications of magnetic nanoparticles.
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Sreekumari A, Ilg P. Anisotropy of magnetoviscous effect in structure-forming ferrofluids. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015; 92:012306. [PMID: 26274161 DOI: 10.1103/physreve.92.012306] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Indexed: 06/04/2023]
Abstract
The magnetoviscous effect, change in viscosity with change in magnetic field strength, and the anisotropy of the magnetoviscous effect, change in viscosity with orientation of magnetic field, have been a focus of interest for four decades. A satisfactory understanding of the microscopic origin of anisotropy of the magnetoviscous effect in magnetic fluids is still a matter of debate and a field of intense research. Here, we present an extensive simulation study to understand the relation between the anisotropy of the magnetoviscous effect and the underlying change in microstructures of ferrofluids. Our results indicate that field-induced chainlike structures respond very differently depending on their orientation relative to the direction of an externally applied shear flow, which leads to a pronounced anisotropy of viscosity. In this work, we focus on three exemplary values of dipolar interaction strengths which correspond to weak, intermediate, and strong interactions between dipolar colloidal particles. We compare our simulation results with an experimental study on cobalt-based ferrofluids as well as with an existing theoretical model called the chain model. A nonmonotonic behavior in the anisotropy of the magnetoviscous effect is observed with increasing dipolar interaction strength and is explained in terms of microstructure formation.
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Affiliation(s)
- Aparna Sreekumari
- Polymer Physics, Department of Materials, ETH Zürich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland
| | - Patrick Ilg
- Polymer Physics, Department of Materials, ETH Zürich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland
- Department of Mathematics and Statistics, University of Reading, Reading RG6 6AX, UK
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26
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Mashhadizadeh MH, Talemi RP. Simple in situ functionalizing of magnetite nanoparticles by 4-nitrobenzenediazonium for construction of a sensitive electrochemical DNA biosensor for detection of a DNA sequence related to Hepatitis B virus. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2015. [DOI: 10.1007/s13738-015-0649-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Lin KYA, Yang H, Lee WD, Tsao KY. A magnetic fluid based on covalent-bonded nanoparticle organic hybrid materials (NOHMs) and its decolorization application in water. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.01.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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28
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Fasih Ramandi N, Shemirani F. Selective ionic liquid ferrofluid based dispersive-solid phase extraction for simultaneous preconcentration/separation of lead and cadmium in milk and biological samples. Talanta 2015; 131:404-11. [DOI: 10.1016/j.talanta.2014.08.008] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 08/02/2014] [Accepted: 08/04/2014] [Indexed: 11/15/2022]
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29
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Khan LU, Brito HF, Hölsä J, Pirota KR, Muraca D, Felinto MC, Teotonio EE, Malta OL. Red-Green Emitting and Superparamagnetic Nanomarkers Containing Fe3O4 Functionalized with Calixarene and Rare Earth Complexes. Inorg Chem 2014; 53:12902-10. [DOI: 10.1021/ic5018856] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Latif U. Khan
- Institute
of Chemistry, Department of Fundamental Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo-SP, Brazil
| | - Hermi F. Brito
- Institute
of Chemistry, Department of Fundamental Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo-SP, Brazil
| | - Jorma Hölsä
- Institute
of Chemistry, Department of Fundamental Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo-SP, Brazil
| | - Kleber R. Pirota
- Institute
of Physics “Gleb Wataghin”, Condensed Matter Physics
Department, State University of Campinas (UNICAMP), 13083-859 Campinas-SP, Brazil
| | - Diego Muraca
- Institute
of Physics “Gleb Wataghin”, Condensed Matter Physics
Department, State University of Campinas (UNICAMP), 13083-859 Campinas-SP, Brazil
| | - Maria C.F.C. Felinto
- Nuclear and Energy Research Institute (IPEN-CQMA), Av. Prof. Lineu Prestes, 2242, 05508-000 São Paulo-SP, Brazil
| | - Ercules E.S. Teotonio
- Department
of Chemistry, Federal University of Paraiba, 58051-970 João
Pessoa-PB, Brazil
| | - Oscar L. Malta
- Department
of Fundamental Chemistry, Federal University of Pernambuco, 50670-901, Recife-PE, Brazil
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30
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Menzel AM. Bridging from particle to macroscopic scales in uniaxial magnetic gels. J Chem Phys 2014; 141:194907. [DOI: 10.1063/1.4901275] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Andreas M. Menzel
- Institut für Theoretische Physik II: Weiche Materie, Heinrich-Heine-Universität Düsseldorf, D-40225 Düsseldorf, Germany
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31
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Ramimoghadam D, Bagheri S, Hamid SBA. Progress in electrochemical synthesis of magnetic iron oxide nanoparticles. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 2014; 368:207-229. [DOI: 10.1016/j.jmmm.2014.05.015] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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32
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Joseph A, Mathew S. Ferrofluids: Synthetic Strategies, Stabilization, Physicochemical Features, Characterization, and Applications. Chempluschem 2014. [DOI: 10.1002/cplu.201402202] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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33
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Nowak J, Wiekhorst F, Trahms L, Odenbach S. The influence of hydrodynamic diameter and core composition on the magnetoviscous effect of biocompatible ferrofluids. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2014; 26:176004. [PMID: 24721897 DOI: 10.1088/0953-8984/26/17/176004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Suspensions of magnetic nanoparticles have received increasing interest in the biomedical field. While these ferrofluids are already used for magnetic resonance imaging, emerging research on cancer treatment focuses, for example, on employing the particles as drug carriers, or using them in magnetic hyperthermia to destroy diseased cells by heating of the particles. To enable safe and effective applications, an understanding of the flow behaviour of the ferrofluids is essential. Regarding the applications mentioned above, in which flow phenomena play an important role, viscosity under the influence of an external magnetic field is of special interest. In this respect, the magnetoviscous effect (MVE) leading to an increasing viscosity if an external magnetic field of a certain strength is applied, is well-known for singlecore ferrofluids used in the engineering context. In the biomedical context, multicore ferrofluids are preferred in order to avoid remanence magnetization and to enable a deposition of the particles by the organism without complications. This study focuses on a comparison of the MVE for three ferrofluids whose composition is identical except in relation to their hydrodynamic diameter and core composition-one of the fluids contains singlecore particles, while the other two feature multicore particles. This enables confident conclusions about the influence of those parameters on flow behaviour under the influence of a magnetic field. The strong effects found for two of the fluids should be taken into account, both in future investigations and in the potential use of such ferrofluids, as well as in manufacturing, in relation to the optimization of flow behaviour.
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Affiliation(s)
- J Nowak
- Chair of Magnetofluiddynamics, Measuring and Automation Technology, Technische Universität Dresden, 01069 Dresden, Germany
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34
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Dispersive solid phase extraction of lead(II) using a silica nanoparticle-based ionic liquid ferrofluid. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1254-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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35
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Altmeyer S, Leschhorn A, Hoffmann C, Lücke M. Elongational flow effects on the vortex growth out of Couette flow in ferrofluids. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 87:053010. [PMID: 23767623 DOI: 10.1103/physreve.87.053010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2013] [Indexed: 06/02/2023]
Abstract
The growth behavior of stationary axisymmetric vortices and of oscillatory, nonaxisymmetric spiral vortices in Taylor-Couette flow of a ferrofluid in between differentially rotating cylinders is analyzed using a numerical linear stability analysis. The investigation is done as a function of the inner and outer cylinder's rotation rates, the axial wave number of the vortex flows, and the magnitude of an applied homogeneous axial magnetic field. In particular, the consequences of incorporating elongational flow effects in the magnetization balance equation on the marginal control parameters that separate growth from decay behavior are determined. That is done for several values of the transport coefficient that measures the strength of these effects.
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Affiliation(s)
- S Altmeyer
- Max Planck Institute for Dynamics and Self-Organization, 37073 Göttingen, Germany.
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36
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37
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Madrakian T, Afkhami A, Ahmadi M. Simple in situ functionalizing magnetite nanoparticles by reactive blue-19 and their application to the effective removal of Pb2+ ions from water samples. CHEMOSPHERE 2013; 90:542-547. [PMID: 23021384 DOI: 10.1016/j.chemosphere.2012.08.025] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Revised: 08/04/2012] [Accepted: 08/13/2012] [Indexed: 06/01/2023]
Abstract
An in situ method for direct attachment of reactive blue-19 onto the surface of magnetite nanoparticles to prepare an efficient adsorbent for removal of Pb(2+) ion from water samples was proposed. The produced modified magnetite nanoparticles (MMNP) were characterized by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and infrared spectroscopy. The synthesized MMNP showed high adsorption capacity to removal of Pb(2+) from wastewater samples. Lead ion adsorption process has been thoroughly studied from both kinetic and equilibrium points of view for adsorbent. The adsorption isotherms were analyzed using the five different isotherm models and correlation coefficients were determined for each isotherm. It was found that the Langmuir isotherm showed better correlation with the experimental data than other isotherms. The adsorption kinetics was tested for the pseudo-first order and pseudo-second order kinetic models at different experimental conditions. The kinetic data showed that the process is very fast and the adsorption process follows pseudo second order kinetic models for modified magnetite adsorbents. Thus, the new nanoparticles are favorable and useful for the removal of this metal ion, and the high adsorption capacity makes them good promising candidate materials for Pb(2+) ion removal from water samples.
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38
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Griffete N, Lamouri A, Herbst F, Felidj N, Ammar S, Mangeney C. Synthesis of highly soluble polymer-coated magnetic nanoparticles using a combination of diazonium salt chemistry and the iniferter method. RSC Adv 2012. [DOI: 10.1039/c1ra00577d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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39
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Soto-Aquino D, Rosso D, Rinaldi C. Oscillatory shear response of dilute ferrofluids: predictions from rotational Brownian dynamics simulations and ferrohydrodynamics modeling. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2011; 84:056306. [PMID: 22181497 DOI: 10.1103/physreve.84.056306] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Indexed: 05/31/2023]
Abstract
Ferrofluids are colloidal suspensions of magnetic nanoparticles that exhibit normal liquid behavior in the absence of magnetic fields but respond to imposed magnetic fields by changing their viscosity without loss of fluidity. The response of ferrofluids to constant shear and magnetic fields has received a lot of attention, but the response of ferrofluids to oscillatory shear remains largely unexplored. In the present work we used rotational Brownian dynamics to study the dynamic properties of ferrofluids with thermally blocked nanoparticles under oscillatory shear and constant magnetic fields. Comparisons between simulations and modeling using the ferrohydrodynamics equations were also made. Simulation results show that, for small rotational Péclet number, the in-phase and out-of-phase components of the complex viscosity depend on the magnitude of the magnetic field and frequency of the shear, following a Maxwell-like model with field-dependent viscosity and characteristic time equal to the field-dependent transverse magnetic relaxation time of the nanoparticles. Comparison between simulations and the numerical solution of the ferrohydrodynamic equations shows that the oscillatory rotational magnetoviscosity for an oscillating shear field obtained using the kinetic magnetization relaxation equation quantitatively agrees with simulations for a wide range of Péclet number and Langevin parameter but has quantitative deviations from the simulations at high values of the Langevin parameter. These predictions indicate an apparent elastic character to the rheology of these suspensions, even though we are considering the infinitely dilute limit in which there are negligible particle-particle interactions and, as such, chains do not form. Additionally, an asymptotic analytical solution of the ferrohydrodynamics equations, valid for Pe<<2, was used to demonstrate that the Cox-Merz rule applies for dilute ferrofluids under conditions of small shear rates. At higher shear rates the Cox-Merz rule ceases to apply.
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Affiliation(s)
- D Soto-Aquino
- Department of Chemical Engineering, University of Puerto Rico, Mayagüez, Mayagüez Puerto Rico
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40
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Gerth-Noritzsch M, Borin DY, Odenbach S. Anisotropy of the magnetoviscous effect in ferrofluids containing nanoparticles exhibiting magnetic dipole interaction. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011; 23:346002. [PMID: 21841240 DOI: 10.1088/0953-8984/23/34/346002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The aim of this work has been the investigation of the anisotropy of the viscosity of a ferrofluid with magnetically interacting particles which are able to form structures in an applied magnetic field. The results of the experiments show a significant deviation from the case of a fluid without strong dipolar interactions. Furthermore, we have determined the dependence of the ratio of the viscosity coefficients on shear rate providing an insight into the microstructural reasons for the observed effects.
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Affiliation(s)
- M Gerth-Noritzsch
- Technische Universit¨at Dresden, Institute of Fluid Mechanics, 01062 Dresden, Germany
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41
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Griffete N, Herbst F, Pinson J, Ammar S, Mangeney C. Preparation of Water-Soluble Magnetic Nanocrystals Using Aryl Diazonium Salt Chemistry. J Am Chem Soc 2011; 133:1646-9. [DOI: 10.1021/ja108928b] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nébéwia Griffete
- ITODYS, Université Paris Diderot-Paris 7 (UMR CNRS 7086), 15 rue Jean de Baïf, 75013 Paris, France
| | - Frédéric Herbst
- ITODYS, Université Paris Diderot-Paris 7 (UMR CNRS 7086), 15 rue Jean de Baïf, 75013 Paris, France
| | - Jean Pinson
- Physico-Chimie des Electrolytes, des Colloïdes et Sciences Analytiques, ESPCI ParisTech, CNRS UMR 7195, 10 rue Vauquelin,75231 Paris Cedex 05, France
| | - Souad Ammar
- ITODYS, Université Paris Diderot-Paris 7 (UMR CNRS 7086), 15 rue Jean de Baïf, 75013 Paris, France
| | - Claire Mangeney
- ITODYS, Université Paris Diderot-Paris 7 (UMR CNRS 7086), 15 rue Jean de Baïf, 75013 Paris, France
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42
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Synthesis of magnetic and fluorescent multifunctional hollow silica nanocomposites for live cell imaging. J Colloid Interface Sci 2010; 350:90-8. [DOI: 10.1016/j.jcis.2010.06.041] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Revised: 06/11/2010] [Accepted: 06/16/2010] [Indexed: 10/19/2022]
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43
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Soto-Aquino D, Rinaldi C. Magnetoviscosity in dilute ferrofluids from rotational brownian dynamics simulations. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2010; 82:046310. [PMID: 21230393 DOI: 10.1103/physreve.82.046310] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Indexed: 05/30/2023]
Abstract
Ferrofluids are suspensions of magnetic nanoparticles which respond to imposed magnetic fields by changing their viscosity without losing their fluidity. Prior work on modeling the behavior of ferrofluids has focused on using phenomenological suspension-scale continuum equations. A disadvantage of this approach is the controversy surrounding the equation describing the rate of change of the ferrofluid magnetization, the so-called magnetization relaxation equation. In this contribution the viscosity of dilute suspensions of spherical magnetic nanoparticles suspended in a Newtonian fluid and under applied shear and constant magnetic fields is studied through rotational brownian dynamics simulations. Simulation results are compared with the predictions of suspension-scale models based on three magnetization relaxation equations. Excellent agreement is observed between simulation results and the predictions of an equation due to Martsenyuk, Raikher, and Shliomis. Good qualitative agreement is observed with predictions of other equations, although these models fail to accurately predict the magnitude and shear rate dependence of the magnetic-field-dependent effective viscosity. Finally, simulation results over a wide range of conditions are collapsed into master curves using a Mason number defined based on the balance of hydrodynamic and magnetic torques.
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Affiliation(s)
- D Soto-Aquino
- Department of Chemical Engineering, University of Puerto Rico, Mayagüez Campus, POBox 9000, Mayagüez, Puerto Rico
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44
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Altmeyer S, Hoffmann C, Leschhorn A, Lücke M. Influence of homogeneous magnetic fields on the flow of a ferrofluid in the Taylor-Couette system. Phys Rev E 2010; 82:016321. [PMID: 20866739 DOI: 10.1103/physreve.82.016321] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2010] [Indexed: 11/07/2022]
Abstract
We investigate numerically the influence of a homogeneous magnetic field on a ferrofluid in the gap between two concentric, independently rotating cylinders. The full Navier-Stokes equations are solved with a combination of a finite difference method and a Galerkin method. Structure, dynamics, symmetry properties, bifurcation, and stability behavior of different vortex structures are investigated for axial and transversal magnetic fields, as well as combinations of them. We show that a transversal magnetic field modulates the Taylor vortex flow and the spiral vortex flow. Thus, a transversal magnetic field induces wavy structures: wavy Taylor vortex flow (wTVF) and wavy spiral vortex flow. In contrast to the classic wTVF, which is a secondarily bifurcating structure, these magnetically generated wavy Taylor vortices are pinned by the magnetic field, i.e., they are stationary and they appear via a primary forward bifurcation out of the basic state of circular Couette flow.
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Affiliation(s)
- S Altmeyer
- Institut für Theoretische Physik, Universität des Saarlandes, Saarbrücken, Germany
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45
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Loginova TP, Lykhina OV, Yudanova EA, Khotina IA, Timofeeva GI, Lependina OL, Volkov VV, Dembo KA, Solodovnikov SP. Synthesis and characterization of cobalt ferrite nanoparticles in hybrid micelles of poly[styrene-block-(ethylene oxide)] and sodium dodecyl sulfate. POLYMER SCIENCE SERIES A 2010. [DOI: 10.1134/s0965545x10080122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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46
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Wu Z, Mueller A, Degenhard S, Ruff SE, Geiger F, Bittner AM, Wege C, Krill CE. Enhancing the magnetoviscosity of ferrofluids by the addition of biological nanotubes. ACS NANO 2010; 4:4531-4538. [PMID: 20731436 DOI: 10.1021/nn100645e] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Applying a magnetic field to many ferrofluids leads to a significant increase in viscosity, but the phenomenon has yet to find technological exploitation because of the thinning caused by even weak shear flows. We have discovered that the addition of plant-virus-derived nanotubes to a commercial ferrofluid can give rise to a dramatic enhancement in magnetoviscosity and a suppression of shear thinning. The dependence of this effect on nanotube aspect ratio and surface charge, both of which were varied biotechnologically, is consistent with a "scaffolding" of magnetic particles into quasi-linear arrays. Direct support for this explanation is derived from transmission electron micrographs, which reveal a marked tendency for the magnetic nanoparticles to decorate the outside surface of the virus nanotubes.
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Affiliation(s)
- Zhenyu Wu
- Institute of Micro and Nanomaterials, Ulm University, Albert-Einstein-Allee 47, 89081 Ulm, Germany
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47
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Odinaev S, Komilov K, Zaripov A. Dependence of the viscosity coefficients of magnetic fluids on parameters of state. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2010. [DOI: 10.1134/s0036024410070265] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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48
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Sánchez J, Rinaldi C. Magnetoviscosity of dilute suspensions of magnetic ellipsoids obtained through rotational Brownian dynamics simulations. J Colloid Interface Sci 2009; 331:500-6. [DOI: 10.1016/j.jcis.2008.11.061] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2008] [Revised: 11/17/2008] [Accepted: 11/19/2008] [Indexed: 10/21/2022]
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49
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Leschhorn A, Lücke M, Hoffmann C, Altmeyer S. Stability of the circular Couette flow of a ferrofluid in an axial magnetic field: influence of polydispersity. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 79:036308. [PMID: 19392050 DOI: 10.1103/physreve.79.036308] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2008] [Revised: 01/06/2008] [Indexed: 05/27/2023]
Abstract
The gap between two concentric rotating cylinders is filled with a ferrofluid. A homogeneous magnetic field is applied parallel to the cylinder axis. The stability of the circular Couette flow is analyzed with different models that take into account the polydispersity of the ferrofluid to a varying degree. Their results are compared and their merits are discussed.
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Affiliation(s)
- A Leschhorn
- Institut für Theoretische Physik, Universität des Saarlandes, D-66041 Saarbrücken, Germany
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Wu W, He Q, Jiang C. Magnetic iron oxide nanoparticles: synthesis and surface functionalization strategies. NANOSCALE RESEARCH LETTERS 2008; 3:397-415. [PMID: 21749733 PMCID: PMC3244954 DOI: 10.1007/s11671-008-9174-9] [Citation(s) in RCA: 983] [Impact Index Per Article: 61.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2008] [Accepted: 09/11/2008] [Indexed: 05/17/2023]
Abstract
Surface functionalized magnetic iron oxide nanoparticles (NPs) are a kind of novel functional materials, which have been widely used in the biotechnology and catalysis. This review focuses on the recent development and various strategies in preparation, structure, and magnetic properties of naked and surface functionalized iron oxide NPs and their corresponding application briefly. In order to implement the practical application, the particles must have combined properties of high magnetic saturation, stability, biocompatibility, and interactive functions at the surface. Moreover, the surface of iron oxide NPs could be modified by organic materials or inorganic materials, such as polymers, biomolecules, silica, metals, etc. The problems and major challenges, along with the directions for the synthesis and surface functionalization of iron oxide NPs, are considered. Finally, some future trends and prospective in these research areas are also discussed.
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Affiliation(s)
- Wei Wu
- Department of Physics, Wuhan University, Wuhan, 430072, People’s Republic of China
| | - Quanguo He
- Key Laboratory of Green Packaging and Bio-Nanotechnology Applications (Hunan Province), Hunan University of Technology, Zhuzhou, 412008, People’s Republic of China
| | - Changzhong Jiang
- Department of Physics, Wuhan University, Wuhan, 430072, People’s Republic of China
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