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Qi C, Tu J, Ding Z, Wang Y, Sun L, Wang C. Experimental study on the influence of bionic channel structure on waste heat utilization equipment. ASIA-PAC J CHEM ENG 2021. [DOI: 10.1002/apj.2668] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Cong Qi
- School of Electrical and Power Engineering China University of Mining and Technology Xuzhou China
| | - Jianglin Tu
- School of Electrical and Power Engineering China University of Mining and Technology Xuzhou China
| | - Zi Ding
- School of Electrical and Power Engineering China University of Mining and Technology Xuzhou China
| | - Yuxing Wang
- School of Electrical and Power Engineering China University of Mining and Technology Xuzhou China
| | - Liang Sun
- School of Electrical and Power Engineering China University of Mining and Technology Xuzhou China
| | - Chengchao Wang
- School of Electrical and Power Engineering China University of Mining and Technology Xuzhou China
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A Numerical Exploration of Modified Second-Grade Nanofluid with Motile Microorganisms, Thermal Radiation, and Wu’s Slip. Symmetry (Basel) 2020. [DOI: 10.3390/sym12030393] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This study is carried out to scrutinize the gyrotactic bioconvection effects on modified second-grade nanofluid with motile microorganisms and Wu’s slip (second-order slip) features. The activation energy and thermal radiation are also incorporated. The suspended nanoparticles in a host fluid are practically utilized in numerous technological and industrial products such as metallic strips, energy enhancement, production processes, automobile engines, laptops, and accessories. Nanoparticles with high thermal characteristics and low volume fraction may improve the thermal performance of the base fluid. By employing the appropriate self-similar transformations, the governing set of partial differential equations (PDEs) are reduced into the ordinary differential equations (ODEs). A zero mass flux boundary condition is proposed for nanoparticle diffusion. Then, the transmuted set of ODEs is solved numerically with the help of the well-known shooting technique. The numerical and graphical illustrations are developed by using a collocation finite difference scheme and three-stage Lobatto III as the built-in function of the bvp4c solver via MATLAB. Behaviors of the different proficient physical parameters on the velocity field, temperature distribution, volumetric nanoparticles concentration profile, and the density of motile microorganism field are deliberated numerically as well as graphically.
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Impact of Second-Order Slip and Double Stratification Coatings on 3D MHD Williamson Nanofluid Flow with Cattaneo–Christov Heat Flux. COATINGS 2019. [DOI: 10.3390/coatings9120849] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The present research examines the impact of second-order slip with thermal and solutal stratification coatings on three-dimensional (3D) Williamson nanofluid flow past a bidirectional stretched surface and envisages it analytically. The novelty of the analysis is strengthened by Cattaneo–Christov (CC) heat flux accompanying varying thermal conductivity. The appropriate set of transformations is implemented to get a differential equation system with high nonlinearity. The structure is addressed via the homotopy analysis technique. The authenticity of the presented model is verified by creating a comparison with the limited published results and finding harmony between the two. The impacts of miscellaneous arising parameters are deliberated through graphical structures. Some useful tabulated values of arising parameters versus physical quantities are also discussed here. It is observed that velocity components exhibit an opposite trend with respect to the stretching ratio parameter. Moreover, the Brownian motion parameter shows the opposite behavior versus temperature and concentration distributions.
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Ramzan M, Mohammad M, Howari F. Magnetized suspended carbon nanotubes based nanofluid flow with bio-convection and entropy generation past a vertical cone. Sci Rep 2019; 9:12225. [PMID: 31434973 PMCID: PMC6704177 DOI: 10.1038/s41598-019-48645-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 08/02/2019] [Indexed: 11/18/2022] Open
Abstract
The captivating attributes of carbon nanotubes (CNT) comprising chemical and mechanical steadiness, outstanding electrical and thermal conductivities, featherweight, and physiochemical consistency make them coveted materials in the manufacturing of electrochemical devices. Keeping in view such exciting features of carbon nanotubes, our objective in the present study is to examine the flow of aqueous based nanofluid comprising single and multi-wall carbon nanotubes (CNTs) past a vertical cone encapsulated in a permeable medium with convective heat and solutal stratification. The impacts of heat generation/absorption, gyrotactic-microorganism, thermal radiation, and Joule heating with chemical reaction are added features towards the novelty of the erected model. The coupled differential equations are attained from the partial differential equations by exercising the local similarity transformation technique. The set of conservation equations supported by the associated boundary conditions are worked out numerically by employing bvp4c MATLAB function. The sway of numerous appearing parameters in the analysis on the allied distributions is scrutinized and the fallouts are portrayed graphically. The physical quantities of interest including Skin friction coefficient, the rate of heat and mass transfers are assessed versus essential parameters and their outcomes are demonstrated in tabulated form. It is witnessed that the velocity of the fluid decreases for boosting values of the magnetic and suction parameters in case of both nanotubes. Moreover, the density of motile microorganism is decreased versus larger estimates of bio-convection constant. A notable highlight of the presented model is the endorsement of the results by matching them to an already published material in the literature. A venerable harmony in this regard is achieved.
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Affiliation(s)
- Muhammad Ramzan
- Department of Computer Science, Bahria University, 44000, Islamabad, Pakistan.
- Department of Mechanical Engineering, Sejong University, Seoul, 143-747, Korea.
| | - Mutaz Mohammad
- Department of Mathematics & Statistics, College of Natural and Health Sciences, Zayed University, 144543, Abu Dhabi, UAE
| | - Fares Howari
- College of Natural and Health Sciences, Zayed University, 144543, Abu Dhabi, UAE
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A Numerical Simulation of Silver–Water Nanofluid Flow with Impacts of Newtonian Heating and Homogeneous–Heterogeneous Reactions Past a Nonlinear Stretched Cylinder. Symmetry (Basel) 2019. [DOI: 10.3390/sym11020295] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The aim of the present study is to address the impacts of Newtonian heating and homogeneous–heterogeneous (h-h) reactions on the flow of Ag–H2O nanofluid over a cylinder which is stretched in a nonlinear way. The additional effects of magnetohydrodynamics (MHD) and nonlinear thermal radiation are also added features of the problem under consideration. The Shooting technique is betrothed to obtain the numerical solution of the problem which is comprised of highly nonlinear system ordinary differential equations. The sketches of different parameters versus the involved distributions are given with requisite deliberations. The obtained numerical results are matched with an earlier published work and an excellent agreement exists between both. From our obtained results, it is gathered that the temperature profile is enriched with augmented values radiation and curvature parameters. Additionally, the concentration field is a declining function of the strength of h-h reactions.
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Suleman M, Ramzan M, Zulfiqar M, Bilal M, Shafee A, Chung JD, Lu D, Farooq U. Entropy Analysis of 3D Non-Newtonian MHD Nanofluid Flow with Nonlinear Thermal Radiation Past over Exponential Stretched Surface. ENTROPY 2018; 20:e20120930. [PMID: 33266654 PMCID: PMC7512516 DOI: 10.3390/e20120930] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 11/28/2018] [Accepted: 12/02/2018] [Indexed: 11/25/2022]
Abstract
The present study characterizes the flow of three-dimensional viscoelastic magnetohydrodynamic (MHD) nanofluids flow with entropy generation analysis past an exponentially permeable stretched surface with simultaneous impacts of chemical reaction and heat generation/absorption. The analysis was conducted with additional effects nonlinear thermal radiation and convective heat and mass boundary conditions. Apposite transformations were considered to transform the presented mathematical model to a system of differential equations. Analytical solutions of the proposed model were developed via a well-known homotopy analysis scheme. The numerically calculated values of the dimensionless drag coefficient, local Nusselt number, and mass transfer Nusselt number are presented, with physical insights. The graphs depicting the consequences of numerous parameters on involved distributions with requisite deliberations were also a part of this model. It is seen that the Bejan number is an increasing function of the thermal radiation parameter.
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Affiliation(s)
- Muhammad Suleman
- Department of Mathematics, Faculty of Science, Jiangsu University, Zhenjiang 212013, China
- Department of Mathematics, COMSATS University, Islamabad Campus, Islamabad 44000, Pakistan
| | - Muhammad Ramzan
- Department of Mathematics, Faculty of Science, Jiangsu University, Zhenjiang 212013, China
- Department of Computer Science, Bahria University, Islamabad Campus, Islamabad 44000, Pakistan
- Correspondence:
| | - Madiha Zulfiqar
- Department of Mathematics, Allama Iqbal Open University, Islamabad 44000, Pakistan
| | - Muhammad Bilal
- Department of Mathematics, University of Lahore, Gujrat Campus, Gujranwala 52250, Pakistan
| | - Ahmad Shafee
- Applied Science Department, College of Technological Studies, Public Authority of Applied Education & Training, Shuwaikh 70030, Kuwait
| | - Jae Dong Chung
- Department of Mechanical Engineering, Sejong University, Seoul 143-747, Korea
| | - Dianchen Lu
- Department of Mathematics, Faculty of Science, Jiangsu University, Zhenjiang 212013, China
| | - Umer Farooq
- Department of Mathematics, Faculty of Science, Jiangsu University, Zhenjiang 212013, China
- Department of Mathematics, COMSATS University, Islamabad Campus, Islamabad 44000, Pakistan
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