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Entropy generation minimisation: Nonlinear mixed convective flow of Sisko nanofluid

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Abstract

Two-dimensional magneto-Sisko nanofluid flow bounded by nonlinearly stretching sheet is studied. Thermophoretic diffusion and Brownian motion effects are also scrutinised. Additionally, impacts of activation energy, chemical reaction and nonlinear convection are considered. The purpose of this study is to analyse entropy generation in the Sisko fluid model. Suitable transformations are used to reduce the governing equation of motion, concentration and temperature. Effects of some pertinent variables on skin friction coefficient, temperature, velocity, concentration and Nusselt number are graphically presented. Clearly, for larger Brownian and thermophoresis parameters, the temperature increases while concentration distribution decreases with Brownian parameter. Bejan number is maximum away from the sheet in the case of shear thickening fluids while it approaches zero for shear thinning fluids.

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Authors and Affiliations

  1. Department of Mathematics, Quaid-I-Azam University 45320, Islamabad, 44000, Pakistan

    Tasawar Hayat, Faria Masood & Sumaira Qayyum

  2. Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia

    Tasawar Hayat & Ahmed Alsaedi

Authors
  1. Tasawar Hayat
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  2. Faria Masood
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  3. Sumaira Qayyum
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  4. Ahmed Alsaedi
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Correspondence to Sumaira Qayyum.

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Hayat, T., Masood, F., Qayyum, S. et al. Entropy generation minimisation: Nonlinear mixed convective flow of Sisko nanofluid. Pramana - J Phys 93, 96 (2019). https://doi.org/10.1007/s12043-019-1838-8

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  • DOI: https://doi.org/10.1007/s12043-019-1838-8

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