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Open AccessArticle

Variable Viscosity Effects on Unsteady MHD an Axisymmetric Nanofluid Flow over a Stretching Surface with Thermo-Diffusion: FEM Approach

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Department of Applied Mathematics, School of Science, Northwestern Polytechnical University, Dongxiang Road, Chang’an District, Xi’an 710129, China
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Department of Intelligent Mechatronics, Sejong University, Seoul 100083, Korea
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School of Automation, Northwestern Polytechnical University, 127 West Youyi Road, Xi’an 710072, China
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College of Internet of Things Engineering, Hohai University, Changzhou 213022, China
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School of Mathematics, Northwest University, No. 229 North Taibai Avenue, Xi’an 7100069, China
*
Author to whom correspondence should be addressed.
Bagh Ali and Rizwan Ali Naqvi are Co-first author, these authors contributed equally to this work.
Symmetry 2020, 12(2), 234; https://doi.org/10.3390/sym12020234
Received: 24 December 2019 / Revised: 18 January 2020 / Accepted: 27 January 2020 / Published: 4 February 2020
The present study investigated the unsteady magnetohydrodynamic (MHD) nanofluid flow over a radially nonlinear stretching sheet along with the viscosity dependent on temperature, convective boundary condition, thermo-diffusion, and the radiation effects. Moreover, the nanofluid’s viscous effects were considered dependent on temperature and the exponential Reynolds model was considered in this context. It was additionally assumed that a uniform suspension of nanoparticles is present in the base fluid. The Buongiorno model, which involves the thermophoresis and Brownian motion effects, was considered. For the sake of a solution, the variational finite element method was selected with coding in MATLAB and the numerical results were contrasted with the published articles. The influence of various physical parameters on the velocity, temperature, and concentration profiles are discussed by the aid of graphs and tables. It was detected that the nanofuid viscosity parameter declines the fluid flow velocity, while, for the temperature and the concentration profiles, it accomplished the reverse phenomenon. View Full-Text
Keywords: nano-fliud; themo-diffussion; MHD; finite element method; convective surface bounday conditions; variable vioscosity nano-fliud; themo-diffussion; MHD; finite element method; convective surface bounday conditions; variable vioscosity
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Ali, B.; Naqvi, R.A.; Nie, Y.; Khan, S.A.; Sadiq, M.T.; Rehman, A.U.; Abdal, S. Variable Viscosity Effects on Unsteady MHD an Axisymmetric Nanofluid Flow over a Stretching Surface with Thermo-Diffusion: FEM Approach. Symmetry 2020, 12, 234.

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