Unsteady MHD non-Newtonian (rheological) heat transfer nanofluids with entropy generation analysis

Shukla, N, Rana, P and Beg, OA 2018, 'Unsteady MHD non-Newtonian (rheological) heat transfer nanofluids with entropy generation analysis' , Nonlinear Engineering - Modeling and Application . (In Press)

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Abstract

A theoretical study of unsteady magnetohydrodynamic boundary layer stagnation point flow, heat and mass transfer of a second grade electrically-conducting nanofluid from a horizontal stretching sheet with thermal slip and second order slip velocity effects is presented. The Buongiorno formulation is employed for nanofluids and in addition the no-flux nanoparticle boundary condition is also considered. The appropriate similarity transformations are applied to convert the governing equations into the system of nonlinear partial differential equations, which is solved by using homotopy analysis method. Entropy generation and Bejan number have also been evaluated for the effects of magnetic parameter, Reynolds number and slip parameter in non-Newtonian (second-grade) time-dependent flow. The computations show that skin friction coefficient and entropy generation number increase with an increment in magnetic parameter whereas Bejan number decreases with it. Local Nusselt number decreases with an increase in the value of Eckert number (viscous dissipation) and thermal slip whereas the converse behaviour is captured for velocity parameter. The work is relevant to magnetohydrodynamic nanomaterials processing.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Nonlinear Engineering - Modeling and Application
Publisher: De Gruyter
ISSN: 2192-8029
Depositing User: OA Beg
Date Deposited: 11 Jun 2018 13:23
Last Modified: 11 Jun 2018 13:49
URI: http://usir.salford.ac.uk/id/eprint/47295

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