Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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Numerical Study of Entropy Generation with Nonlinear Thermal Radiation on Magnetohydrodynamics non-Newtonian Nanofluid Through a Porous Shrinking Sheet

  • Bhatti, M.M. (Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University) ;
  • Abbas, T. (Department of Mathematics, Quaid-I-Azam University) ;
  • Rashidi, M.M. (Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Tongji University)
  • Received : 2016.04.20
  • Accepted : 2016.06.16
  • Published : 2016.09.30
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Abstract

In this article, entropy generation on MHD Williamson nanofluid over a porous shrinking sheet has been analyzed. Nonlinear thermal radiation and chemical reaction effects are also taken into account with the help of energy and concentration equation. The fluid is electrically conducting by an external applied magnetic field while the induced magnetic field is assumed to be negligible due to small magnetic Reynolds number. The governing equations are first converted into the dimensionless expression with the help of similarity transformation variables. The solution of the highly nonlinear coupled ordinary differential equation has been obtained with the combination of Successive linearization method (SLM) and Chebyshev spectral collocation method. Influence of all the emerging parameters on entropy profile, temperature profile and concentration profile are plotted and discussed. Nusselt number and Sherwood number are also computed and analyzed. It is observed that entropy profile increases for all the physical parameters. Moreover, it is found that when the fluid depicts non-Newtonian (Williamson fluid) behavior then it causes reduction in the velocity of fluid, however, non-Newtonian behavior enhances the temperature and nanoparticle concentration profile.

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