Entropy analysis of EMHD non-Newtonian fluid flow induced by Riga plate with slip and convective boundary phenomena

Mohamed Abd El-Aziz and Ahmed A. Afify ()
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Mohamed Abd El-Aziz: Department of Mathematics, Faculty of Science, King Khalid University, Abha 61421, Saudi Arabia
Ahmed A. Afify: Department of Mathematics, Deanship of Educational Services, Qassim University, P.O. Box 6595 Buraidah

International Journal of Modern Physics C (IJMPC), 2020, vol. 31, issue 05, 1-18

Abstract: Our paper is consecrated to show the influence of variable fluid properties in EMHD non-Newtonian power-law fluid along a moving Riga plate. Slip velocity phenomenon is considered at the surface which is convectively heated. Entropy analysis is elaborated employing thermodynamic second relation. The governing nonlinear PDEs are altered into ODEs through adequate propinquity transformations which have been solved numerically via the shooting method with the fourth-order Runge–Kutta algorithm through Mathematica software (bvp4c). Characteristics of different basic parameters on velocity, temperature, entropy generation and Bejan number are highlighted through graphs. The outcomes exhibit that the minimum entropy rate in the flow system can be obtained either with rising viscosity parameter and slip parameter or declining dimensionless parameter and thermal conductivity parameter. The entropy rate is minimal for dilatant fluid when compared to pseudo plastic fluid with the most governing parameters. Contrast behavior on the thermal field is noticed for larger values of viscosity parameter and thermal conductivity parameter.

Keywords: EMHD non-Newtonian power-law fluid; Riga plate; slip factor; variable fluid properties; entropy generation; Bejan number (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1142/S0129183120500667

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