Investigation of variable viscosity and thermal conductivity on MHD mass transfer flow problem over a moving non-isothermal vertical plate

Abstract

In this paper we investigate numerically the influence of variable viscosity and thermal conductivity on MHD convective flow of heat and mass transfer problem over a moving non-isothermal vertical plate. The viscosity of the fluid and thermal conductivity are presumed to be the inverse linear functions of temperature. With the help of similarity substitution, the flow governing equations and boundary conditions are transformed into non-dimensional ordinary differential equations. The boundary value problem so obtained is then solved using MATLAB bvp4c solver. The effects of various parameters viz. magnetic parameter, viscosity parameter, thermal conductivity parameter, stratification parameter and Schmidt number on velocity, temperature and concentration are obtained numerically and presented trough graphs. Also the coefficient of skin-friction, Nusselt number and Sherwood number are computed and displayed in tabular form. The effects of the viscosity parameter and thermal conductivity parameter in particular are prominent. This study has applications in a number of technological processes such as metal and polymer extrusion.

Effects of Viscosity and Magnetic Field on a Non-Isothermal Cylindrical Channel Flow

“…Using a euler-lagrange approach of modelling Jazcscur [9] carried an investigation in a fully developed nonisotherml flow packed with particles and find out that particle's mean temperature is very much affected with increase in particle concentration near the walls. While Subhakar and others [10] who took into consideration constant viscosity and thermal conductivity of the work of [11]. Furthermore, Nwaigwe & Makinde [12] considered a coupled effect of energy dependent viscosity alongside with specie dependent diffusivity in a nonisothermal pressure driven and unsteady flow.…”

“…It was realized that increase in the movement of wall channel increases the fluid velocity. While Ahmed and his team [11] worked on the MHD mass transfer on a moving nonisothermal flow considering variable viscosity and thermal conductivity presuming the variation viscosity as inverse linear function of temperature . Nwaigwe [16] numerically carried out a work on mass and heat diffusion in a two parallel stationary walls and discovered that the thermal Grashof number and other parameters increase flow velocity of the fluid.…”

Double Diffusive Free Convection With Variable Physical Properties in an Unstable Stratified Media

“…Sahin Ahmed and G.C. Hazarika [16] examined flow and transport quantities of practical interest on MHD free convective flow over a non-isothermal vertical plate together with varying viscosity and thermal conductivity. Based on the fundamental definitions, the physical insight of the parameters of viscosity variation, thermal conductivity variation, magnetic hydrodynamic body force and stratification had been given utmost importance.…”

The impact of variable fluid properties on natural convection flow past a vertical cone

“…Mushtaq et al [17] analyzed the variable fluid properties and their influences on MHD flow due to the exponentially stretching sheet. Ahmed et al [18] numerically investigated the outcome of variable viscosity and thermal conductivity on MHD convective flow past a non-isothermal moving vertical plate. Ahmed et al [19] explored the impact of an exothermic catalytic chemical reaction on the free convection flow of a viscous fluid past a curved surface where the thermal conductivity and viscosity are proportional to the temperature.…”