Unsteady MHD Non-Newtonian Heat Transfer Nanofluids with Entropy Generation Analysis

Nonlinear engineering: Modeling and application

article

Nisha Shukla¹  Puneet Rana¹  O. Anwar Bég² 

[1] Department of Mathematics, Jaypee Institute of Information Technology;Aeronautical and Mechanical Engineering, School of Computing, Science & Engineering, University of Salford

关键词: Unsteady flow;    Heat and mass transfer;    Magnetohydrodynamics;    Non-Newtonian nanofluid;    Stretching sheet;    HAM solutions;    Entropy;    Bejan number;   

DOI  :  10.1515/nleng-2017-0177

来源: De Gruyter

【 摘 要 】

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.

【 授权许可】

Unknown