Title: Entropy analysis in MHD nanofluid flow near a convectively heated stretching surface

Authors: Adnan Saeed Butt; Asif Ali; Ahmer Mehmood

Addresses: Department of Mathematics, Quaid-I-Azam University, Islamabad 44000, Pakistan ' Department of Mathematics, Quaid-I-Azam University, Islamabad 44000, Pakistan; Department of Mathematics and Natural Sciences, Prince Mohammad Bin Fahd University, Al Khobar 31952, Saudi Arabia ' Department of Mathematics, International Islamic University, Islamabad 44000, Pakistan

Abstract: A comprehensive study of entropy generation in hydromagnetic boundary layer flow of nanofluid over a convectively heated stretching surface is conducted in the presence of viscous and joule dissipation. The Buongiorno model is employed to represent the nanofluid where the thermophoresis and Brownian motion effects are of prime focus. The partial differential equations governing the transport phenomena are converted to non-linear ordinary differential equations using suitable similarity transformations. These transformed equations are then solved analytically with the help of optimal homotopy analysis method (OHAM). Comparison of the obtained results is made with the previous studies under certain limiting cases. The main emphasis is kept on examining the effects of pertinent parameters involved in the problem on entropy production. Detail parametric study is carried out and the results are represented through graphs and tables.

Keywords: Buongiorno model; Brownian motion; thermophoresis; entropy generation; convective surfaces; entropy analysis; magnetohydrodynamics; MHD nanofluids; fluid flow; convection heating; stretching surfaces; boundary layer flow; nanotechnology; partial differential equations; PDEs; nonlinear ODEs; ordinary differential equations; optimal homotopy analysis.

DOI: 10.1504/IJEX.2016.077429

International Journal of Exergy, 2016 Vol.20 No.3, pp.318 - 342

Received: 28 Apr 2015
Accepted: 11 Aug 2015

Published online: 29 Jun 2016 *

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