Explicit numerical study of unsteady hydromagnetic mixed convective nanofluid flow from an exponentially stretching sheet in porous media

Abstract

A numerical investigation of unsteady magnetohydrodynamic mixed convective boundary layer flow of a nanofluid over an exponentially stretching sheet in porous media, is presented. The transformed, non-similar conservations equations are solved using a robust, explicit, finite difference method (EFDM). A detailed stability and convergence analysis is also conducted. The regime is shown to be controlled by a number of emerging thermophysical parameters i.e. combined porous and hydromagnetic parameter (R), thermal Grashof number (G r ), species Grashof number (G m ), viscosity ratio parameter (K), dimensionless porous media inertial parameter (r), Eckert number (E c ), Lewis number (L e ), Brownian motion parameter (N b ) and thermophoresis parameter (N t ). The flow is found to be accelerated with increasing thermal and species Grashof numbers and also increasing Brownian motion and thermophoresis effects. However, flow is decelerated with increasing viscosity ratio and combined porous and hydromagnetic parameters. Temperatures are enhanced with increasing Brownian motion and thermophoresis as are concentration values. With progression in time the flow is accelerated and temperatures and concentrations are increased. EFDM solutions are validated with an optimized variational iteration method. The present study finds applications in magnetic nanomaterials processing.

Williamson Fluid Flow Behaviour of MHD Convective-Radiative Cattaneo–christov Heat Flux Type Over a Linearly Stretched-Surface With Heat Generation and Thermal-Diffusion

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MHD Maxwell Fluid Flow in Presence of Nano-Particle Through a Vertical Porous-Plate With Heat-Generation, Radiation Absorption and Chemical Reaction

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Chemically Reactive Viscoelastic Fluid Flow in Presence of Nano Particle Through Porous Stretching Sheet

“…Therefore, it is thought desirable to investigate this problem in the present study. A well-known explicit finite difference method (EFDM) (Khan et al, 2012;Bég et al, 2014) employed as a numerical tool to solve the flow governing model. Dogonchi et al (2017) investigated MHD Go-water nanofluid flow and heat transfer in a porous channel in the presence of thermal radiation effect with DRA method.…”