Heat and mass transfer in magnetohydrodynamics (MHD) flow over an exponentially stretching sheet in a thermally stratified medium

Abstract

This analysis is on a steady two-dimensional laminar MHD boundary layer flow of an incompressible viscous fluid over an exponential stretching sheet with the presence of thermal stratification and suction. The governing partial differential equations of continuity, momentum, energy, and concentration are transformed into nonlinear ordinary differential equations by using suitable similarity variables. The nonlinear differential equations are then solved numerically by using Runge-Kutta-Fehlberg method along with shooting technique. The effects of various material parameters on the velocity, temperature and concentration profiles are presented graphically and discussed. The results show that the velocity, temperature, and concentration profiles decrease with increasing suction parameter. Higher magnetic parameter reduces the velocity but increases both temperature and concentration. An increase in Prandtl number and thermal stratification parameter reduce the fluid temperature. The concentration boundary layer thickness decreases with increasing Schmidt number.