Significance of non-uniform heat generation/absorption in hydromagnetic flow of nanofluid due to stretching/shrinking disk

In this study, chemical reaction and radiation's characteristics in magnetohydrodynamics (MHD) flow of nanofluids induced by radially stretching/shrinking disk with nonuniform heat source/sink is addressed. The conundrum is formulated in the form of partial differential equations and similarity transformations are applied to procure undemanding set of partially coupled ordinary differential equations. The solution of these equations along with corresponding boundary conditions is determined through an efficient numerical solver. The ramifications of radiation, magnetic field, chemical reaction, thermophoresis, Brownian motion and porosity of medium are comprehensively anatomized. Additionally, the effect of these parameters on the Nusselt number, Sherwood number and skin friction coefficient are also determined. The comparison of the proposed model with existing literature favors the validity of this work. MHD flow of nanofluid in the existence of heat source/sink is discussed for the first time to this scenario. Furthermore, the results are summarized for both shrinking and stretching cases. The higher values of Prandtl number are providing an enhanced temperature while thermophoretic and Brownian motion parameters teds to a dropped temperature but its significance is very small for higher values. The chemical reaction and Brownian motion parameters are causing increasing concentration while thermophoretic parameter is providing a dropped concentration. (C) 2019 Elsevier B.V. All rights reserved.