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Hamidzadeh F, Hooshanginejad A, Huang K, Phan TH, Jung S, Pan L. Thin Liquid Film View and Shear Stress During the Sliding of Air Bubbles on Tilted Plates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 39316659 DOI: 10.1021/acs.langmuir.4c02901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2024]
Abstract
The challenge when studying the impact and sliding of free-rising air bubbles on tilted surfaces is an experimental limitation in obtaining the film thickness of thin liquid film (TLF) during the bubbles' sliding on tilted surfaces. In this work, spatiotemporal evolution in the film thickness of the moving TLF between a sliding air bubble and a tilted plate was monitored by using a two-wavelength synchronized reflection interferometry microscopy (SRIM) technique. The evolution of the film thickness was directly determined from a timed series of monochromatic interference fringes recorded simultaneously at two different wavelengths. From the film thickness profile, a shear stress map at a given time was determined at different bubble sizes and inclination angles. Results showed that the film thickness of TLFs during the bubbles' sliding on tilted surfaces was in the range of 300-1200 nm, depending on bubble size and tilting angles. Sliding of air bubbles on tilted plates over a thin gap with a few hundred nanometers thickness yielded shear stress in the order of 10-50 Pa. Both the larger bubble size and higher tilting angles yielded a higher shear stress. Experimental results were quantitatively compared to numerical results obtained using the Reynolds lubrication theory. A good match between the two results was achieved. Numerical results suggested that a maximum shear stress exerted on a tilted plate occurred at a 25° tilting angle. This is the first time that the spatiotemporal evolution of TLF during bubbles' sliding on tilted surfaces has been achieved, and the shear stress exerted on the tilted surface has been directly determined.
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Affiliation(s)
- Fatemeh Hamidzadeh
- Department of Chemical Engineering, Michigan Technological University, Houghton, Michigan 49931, United States
| | - Alireza Hooshanginejad
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York 14850, United States
- Center for Fluid Mechanics, School of Engineering, Brown University, Providence, Rhode Island 02912, United States
| | - Kaiwu Huang
- Department of Chemical Engineering, Michigan Technological University, Houghton, Michigan 49931, United States
| | - Tri Hoa Phan
- Department of Chemical Engineering, Michigan Technological University, Houghton, Michigan 49931, United States
| | - Sunghwan Jung
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York 14850, United States
| | - Lei Pan
- Department of Chemical Engineering, Michigan Technological University, Houghton, Michigan 49931, United States
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2
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Hamidzadeh F, Huang K, Ye X, Pan L. Nanoscale Investigation into Dynamics of Thin Liquid Films during Bouncing and Attachment of Rising Air Bubbles on Hydrophilic and Hydrophobic Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 38032758 DOI: 10.1021/acs.langmuir.3c02892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Investigations on bouncing and attachment of free-rising air bubbles on hydrophobic surfaces have been limited to side-view, high-speed photography of the bubble-plate attachment process. In this work, an investigation of the dynamics as well as stability of thin liquid films (TLFs) between free-rising air bubbles and quartz surfaces was performed using a newly developed multiple-wavelength synchronized reflection interferometry microscopy (SRIM) technique. The effect of surface hydrophobicity on both the stability and critical rupture thickness of TLFs was investigated. Results showed that the TLF ruptured at a critical rupture thickness of 100-1000 nm or beyond during bubble's impact on hydrophobic quartz surfaces. The critical rupture thicknesses varied depending on the surface hydrophobicity as well as surface asperity. A higher surface hydrophobicity, in general, contributed to a higher critical rupture thickness. In addition, the effect of n-octanol on the stability of the TLFs was investigated. Results showed that film stability increased with increasing the concentration of n-octanol, which was accompanied by a significant decrease in the critical rupture thickness. The present result illustrates, for the first time, the dynamics of TLFs on hydrophobic surfaces under a dynamic condition compared with previous studies under a quasi-equilibrium condition. The information revealed from the present work has a significant implication to many industrial applications, including froth flotation and other biological and semiconductor applications.
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Affiliation(s)
- Fatemeh Hamidzadeh
- Department of Chemical Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931, United States
| | - Kaiwu Huang
- Department of Chemical Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931, United States
| | - Xinyu Ye
- Department of Civil, Environmental and Geospatial Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931, United States
| | - Lei Pan
- Department of Chemical Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, Michigan 49931, United States
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3
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Vakarelski IU, Yang F, Thoroddsen ST. Effects of interface mobility on the dynamics of colliding bubbles. Curr Opin Colloid Interface Sci 2022. [DOI: 10.1016/j.cocis.2021.101540] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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4
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Chen Z, Yang X, Wang B, Dai J, Bai Z. Adhesion behavior of oil droplets on solid surface with different wettability and inclined angle in water. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1950547] [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]
Affiliation(s)
- Zhiwen Chen
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, P.R. China
| | - Xiaoyong Yang
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, P.R. China
| | - Bingjie Wang
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, P.R. China
| | - Jian Dai
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, P.R. China
| | - Zhishan Bai
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, P.R. China
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Vakarelski IU, Yang F, Tian YS, Li EQ, Chan DYC, Thoroddsen ST. Mobile-surface bubbles and droplets coalesce faster but bounce stronger. SCIENCE ADVANCES 2019; 5:eaaw4292. [PMID: 31692762 PMCID: PMC6814372 DOI: 10.1126/sciadv.aaw4292] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 09/13/2019] [Indexed: 06/05/2023]
Abstract
Enhancing the hydrodynamic interfacial mobility of bubbles and droplets in multiphase systems is expected to reduce the characteristic coalescence times and thereby affect the stability of gas or liquid emulsions that are of wide industrial and biological importance. However, by comparing the controlled collision of bubbles or water droplets with mobile or immobile liquid interfaces, in a pure fluorocarbon liquid, we demonstrate that collisions involving mobile surfaces result in a significantly stronger series of rebounds before the rapid coalescence event. The stronger rebound is explained by the lower viscous dissipation during collisions involving mobile surfaces. We present direct numerical simulations to confirm that the observed rebound is enhanced with increased surface mobility. These observations require a reassessment of the role of surface mobility for controlling the dynamic stability of gas or liquid emulsion systems relevant to a wide range of processes, from microfluidics and pharmaceuticals to food and crude oil processing.
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Affiliation(s)
- Ivan U. Vakarelski
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Fan Yang
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Yuan Si Tian
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Er Qiang Li
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
- Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China
| | - Derek Y. C. Chan
- School of Mathematics and Statistics, University of Melbourne, Parkville, VIC 3010, Australia
- Department of Mathematics, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Sigurdur T. Thoroddsen
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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6
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Role of mineral flotation technology in improving bitumen extraction from mined Athabasca oil sands—II. Flotation hydrodynamics of water‐based oil sand extraction. CAN J CHEM ENG 2019. [DOI: 10.1002/cjce.23598] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Wang J, Cao Y, Xing Y, Li G, Liao Y, Li S, An M. Spreading behavior of oil droplets over polytetrafluoroethylene plates in deionized water. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1645025] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Junchao Wang
- Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology , Xuzhou , Jiangsu , China
- School of Chemical Engineering and Technology, China University of Mining and Technology , Xuzhou , Jiangsu , China
| | - Yijun Cao
- Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology , Xuzhou , Jiangsu , China
- Henan Province Industrial Technology Research Institution of Resources and Materials, Zhengzhou University , Zhengzhou , Henan , China
| | - Yaowen Xing
- Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology , Xuzhou , Jiangsu , China
| | - Guosheng Li
- School of Chemical Engineering and Technology, China University of Mining and Technology , Xuzhou , Jiangsu , China
| | - Yinfei Liao
- Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology , Xuzhou , Jiangsu , China
| | - Shulei Li
- Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology , Xuzhou , Jiangsu , China
| | - Maoyan An
- Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology , Xuzhou , Jiangsu , China
- School of Chemical Engineering and Technology, China University of Mining and Technology , Xuzhou , Jiangsu , China
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Emery TS, Kandlikar SG. Modeling Bubble Collisions at Liquid?Liquid and Compound Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8294-8307. [PMID: 31141373 DOI: 10.1021/acs.langmuir.9b01209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The collision of a bubble at liquid?liquid, solid?liquid?liquid, and gas?liquid?liquid interfaces, the latter two of which are referred to as compound interfaces, is modeled to predict the bubble?s velocity profile and the pressure buildup and drainage rate of the film(s) formed at impact. A force balance approach, previously outlined for bubble collisions at solid and free surfaces, is employed, which takes into account four forces acting on the bubble: buoyancy, drag, inertia of the surrounding liquid through an added mass force, and a film force resulting from the pressure buildup in the liquid film formed between the bubble and the interface upon impact. The augmented Young?Laplace equation is applied to define the pressure buildup in the film(s), while lubrication theory is employed to define the film drainage rate(s) through the use of the Stokes?Reynolds equation. This is the first time this modeling technique has been implemented for bubble collisions with these interface types as all previous models have relied only on grid-based simulations. The models were validated through experiments conducted here with water and silicone oils of various viscosities and from data found in literature. A reasonable agreement is observed between the theoretical and experimental velocity profiles found for these liquid combinations under varying conditions of impact velocity and top film thickness. The spatiotemporal film thickness and pressure profile evolution, features not yet able to be captured through experiment, are also presented and discussed.
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Wang J, Li G, Li S, Wang Y, Xing Y, Ma Z, Cao Y. Investigation on properties of aqueous foams stabilized by aliphatic alcohols and polypropylene glycol. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2018.1479268] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Junchao Wang
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, China
| | - Guosheng Li
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, China
| | - Shulei Li
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, China
| | - Yingwei Wang
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, China
| | - Yaowen Xing
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, China
| | - Zilong Ma
- Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, China
| | - Yijun Cao
- Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, China
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Vakarelski IU, Manica R, Li EQ, Basheva ES, Chan DYC, Thoroddsen ST. Coalescence Dynamics of Mobile and Immobile Fluid Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:2096-2108. [PMID: 29328665 DOI: 10.1021/acs.langmuir.7b04106] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Coalescence dynamics between deformable bubbles and droplets can be dramatically affected by the mobility of the interfaces with fully tangentially mobile bubble-liquid or droplet-liquid interfaces expected to accelerate the coalescence by orders of magnitude. However, there is a lack of systematic experimental investigations that quantify this effect. By using high speed camera imaging we examine the free rise and coalescence of small air-bubbles (100 to 1300 μm in diameter) with a liquid interface. A perfluorocarbon liquid, PP11, is used as a model liquid to investigate coalescence dynamics between fully mobile and immobile deformable interfaces. The mobility of the bubble surface was determined by measuring the terminal rise velocity of small bubbles rising at Reynolds numbers, Re, less than 0.1 and the mobility of free PP11 surface by measuring the deceleration kinetics of the small bubble toward the interface. Induction or film drainage times of a bubble at the mobile PP11-air surface were found to be more than 2 orders of magnitude shorter compared to the case of bubble and an immobile PP11-water interface. A theoretical model is used to illustrate the effect of hydrodynamics and interfacial mobility on the induction time or film drainage time. The results of this study are expected to stimulate the development of a comprehensive theoretical model for coalescence dynamics between two fully or partially mobile fluid interfaces.
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Affiliation(s)
- Ivan U Vakarelski
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST) , Thuwal, 23955-6900, Saudi Arabia
| | - Rogerio Manica
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, Alberta T6G 1H9, Canada
| | - Er Qiang Li
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST) , Thuwal, 23955-6900, Saudi Arabia
- Department of Modern Mechanics, University of Science and Technology of China , Hefei 230027, China
| | - Elka S Basheva
- Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University , 1164 Sofia, Bulgaria
| | - Derek Y C Chan
- School of Mathematics and Statistics, University of Melbourne , Parkville, VIC 3010, Australia
- Department of Mathematics, Swinburne University of Technology , Hawthorn, VIC 3122, Australia
| | - Sigurdur T Thoroddsen
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST) , Thuwal, 23955-6900, Saudi Arabia
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11
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Wang S, Wang C, Tang L, Tao X. Investigation of the relationship between sliding process measurement and induction time test of low rank coal particles in the surfactant solutions. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1405991] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Shiwei Wang
- Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, China
- Department of Mining Engineering and Metallurgical Engineering, Western Australian School of Mines, Curtin University, Kalgoorlie, Australia
| | - Chang Wang
- School of Electrical Engineering and Information, Sichuan University, Chengdu, China
| | - Longfei Tang
- Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, China
| | - Xiuxiang Tao
- Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, China
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Zawala J, Kosior D, Dabros T, Malysa K. Influence of bubble surface fluidity on collision kinetics and attachment to hydrophobic solids. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2015.12.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Manica R, Klaseboer E, Chan DYC. The hydrodynamics of bubble rise and impact with solid surfaces. Adv Colloid Interface Sci 2016; 235:214-232. [PMID: 27378067 DOI: 10.1016/j.cis.2016.06.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 06/16/2016] [Accepted: 06/18/2016] [Indexed: 11/28/2022]
Abstract
A bubble smaller than 1mm in radius rises along a straight path in water and attains a constant speed due to the balance between buoyancy and drag force. Depending on the purity of the system, within the two extreme limits of tangentially immobile or mobile boundary conditions at the air-water interface considerably different terminal speeds are possible. When such a bubble impacts on a horizontal solid surface and bounces, interesting physics can be observed. We study this physical phenomenon in terms of forces, which can be of colloidal, inertial, elastic, surface tension and viscous origins. Recent advances in high-speed photography allow for the observation of phenomena on the millisecond scale. Simultaneous use of such cameras to visualize both rise/deformation and the dynamics of the thin film drainage through interferometry are now possible. These experiments confirm that the drainage process obeys lubrication theory for the spectrum of micrometre to millimetre-sized bubbles that are covered in this review. We aim to bridge the colloidal perspective at low Reynolds numbers where surface forces are important to high Reynolds number fluid dynamics where the effect of the surrounding flow becomes important. A model that combines a force balance with lubrication theory allows for the quantitative comparison with experimental data under different conditions without any fitting parameter.
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Affiliation(s)
- Rogerio Manica
- Institute of High Performance Computing, 1 Fusionopolis Way, 138632, Singapore
| | - Evert Klaseboer
- Institute of High Performance Computing, 1 Fusionopolis Way, 138632, Singapore
| | - Derek Y C Chan
- Department of Mathematics & Statistics, The University of Melbourne, Parkville, 3010, Australia; Department of Chemistry and Biotechnology, Swinburne University of Technology, Hawthorn, 3122, Australia.
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Manica R, Klaseboer E, Chan DYC. The impact and bounce of air bubbles at a flat fluid interface. SOFT MATTER 2016; 12:3271-3282. [PMID: 26924623 DOI: 10.1039/c5sm03151f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The rise and impact of bubbles at an initially flat but deformable liquid-air interface in ultraclean liquid systems are modelled by taking into account the buoyancy force, hydrodynamic drag, inertial added mass effect and drainage of the thin film between the bubble and the interface. The bubble-surface interaction is analyzed using lubrication theory that allows for both bubble and surface deformation under a balance of normal stresses and surface tension as well as the long-range nature of deformation along the interface. The quantitative result for collision and bounce is sensitive to the impact velocity of the rising bubble. This velocity is controlled by the combined effects of interfacial tension via the Young-Laplace equation and hydrodynamic stress on the surface, which determine the deformation of the bubble. The drag force that arises from the hydrodynamic stress in turn depends on the hydrodynamic boundary conditions on the bubble surface and its shape. These interrelated factors are accounted for in a consistent manner. The model can predict the rise velocity and shape of millimeter-size bubbles in ultra-clean water, in two silicone oils of different densities and viscosities and in ethanol without any adjustable parameters. The collision and bounce of such bubbles with a flat water/air, silicone oil/air and ethanol/air interface can then be predicted with excellent agreement when compared to experimental observations.
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Affiliation(s)
- Rogerio Manica
- Institute of High Performance Computing, 1 Fusionopolis Way, 138632, Singapore
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Formation and influence of the dynamic adsorption layer on kinetics of the rising bubble collisions with solution/gas and solution/solid interfaces. Adv Colloid Interface Sci 2015; 222:765-78. [PMID: 25147100 DOI: 10.1016/j.cis.2014.07.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 07/29/2014] [Indexed: 11/23/2022]
Abstract
BACKGROUND The DAL (dynamic adsorption layer) formation, that is, the establishment of uneven distribution of adsorption coverage over the rising bubble surface, with significantly diminished coverage at the upstream pole, is the factor of crucial importance for the bubble motion parameters and kinetic of the bubble collisions with various interfaces. The DAL presence can influence the stability of the thin liquid films formed by the colliding bubble at solution/gas and solution solid interfaces. AIM The purpose of this paper is to critically review the existing state of art regarding the influence of the DAL formation and existence on the bubble motion parameters as well as kinetics of coalescence at free solution surface and three phase contact (TPC) formation at solid/liquid interfaces of different hydrophilic/hydrophobic properties. CONCLUSIONS Despite the fact that up to now there is no direct experimental evidence showing DAL existence, it is documented by experimental data showing clear correlation between bubble local velocity variations and shape pulsations as well as lifetimes of the liquid film formed by the colliding bubble at gas/liquid and gas/solid interfaces.
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Manica R, Klaseboer E, Chan DYC. Force Balance Model for Bubble Rise, Impact, and Bounce from Solid Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6763-6772. [PMID: 26035016 DOI: 10.1021/acs.langmuir.5b01451] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A force balance model for the rise and impact of air bubbles in a liquid against rigid horizontal surfaces that takes into account effects of buoyancy and hydrodynamic drag forces, bubble deformation, inertia of the fluid via an added mass force, and a film force between the bubble and the rigid surface is proposed. Numerical solution of the governing equations for the position and velocity of the center of mass of the bubbles is compared against experimental data taken with ultraclean water. The boundary condition at the air-water interface is taken to be stress free, which is consistent for bubbles in clean water systems. Features that are compared include bubble terminal velocity, bubbles accelerating from rest to terminal speed, and bubbles impacting and bouncing off different solid surfaces for bubbles that have already or are yet to attain terminal speed. Excellent agreement between theory and experiments indicates that the forces included in the model constitute the main physical ingredients to describe the bouncing phenomenon.
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Affiliation(s)
- Rogerio Manica
- †Institute of High Performance Computing, 1 Fusionopolis Way, Singapore 138632, Singapore
| | - Evert Klaseboer
- †Institute of High Performance Computing, 1 Fusionopolis Way, Singapore 138632, Singapore
| | - Derek Y C Chan
- ‡School of Mathematics and Statistics, The University of Melbourne, Victoria 3010, Australia
- §Department of Chemistry and Biotechnology, Swinburne University of Technology, Hawthorn 3122, Australia
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Kosior D, Zawala J, Niecikowska A, Malysa K. Influence of non-ionic and ionic surfactants on kinetics of the bubble attachment to hydrophilic and hydrophobic solids. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2014.11.043] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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