Unsteady MHD free convective heat and mass transfer from a vertical porous plate with Hall current, thermal radiation and chemical reaction effects

Abstract

SUMMARYAn analysis is presented to investigate the effects of chemical reaction, thermal radiation and heat generation or absorption on unsteady free convective heat and mass transfer along an infinite vertical porous plate in the presence of a transverse magnetic field and Hall current. The governing partial differential equations are formulated and transformed by using a similarity transformation into a system of ordinary differential equations. The resulting equations are solved numerically using a fourth-order Runge-Kutta scheme along with the shooting method. The Rosseland approximation is used to describe the radiative heat flux in the energy equation. Numerical results for the velocity, temperature and concentration distributions are shown graphically for different parametric values. The effects of parameters on the local friction coefficients, the Nusselt number and Sherwood numbers are depicted in tabulated form.

Hall and Ion Slip Effects on Free Convection Heat and Mass Transfer of Chemically Reacting Couple Stress Fluid in a Porous Expanding or Contracting Walls With Soret and Dufour Effects

“…Elgazery (2009) examined the flow, heat and mass transfer of an electrically conducting viscous fluid with chemical reaction, Hall and ion slip by considering temperature dependent thermal diffusivity and viscosity. An unsteady magnetohydrodynamic natural convection heat and mass transfer from vertical surface with chemical reaction and radiation effects investigated by Chamkha et al (2011). Patil and Kulkarni (2008) discussed the effect of chemical reaction on convective flow and heat transfer of polar fluid in a porous medium with internal heat generation.…”

Numerical investigation of Dufour and Soret effects on unsteady MHD natural convection flow past vertical plate embedded in non-Darcy porous medium

“…Makinde [19] investigated the MHD boundary layer flow with the heat and mass transfer over a moving vertical plate in the presence of magnetic field and convective heat exchange at the surface. Recently, Ali-Chamkha and Mansour [20] examined the effect of chemical reaction, thermal radiation, and heat generation or absorption on the unsteady MHD free convective heat and mass transfer along an infinite vertical plate. More recently, Ramana-Murthy and Hari [21] examined the nature of the various flow entities of an unsteady two-dimensional laminar convective boundary layer flow of a viscous incompressible and chemically reacting fluid along a semi-infinite vertical plate with suction by taking the effects of dissipation into account.…”

Couple Stresses and Thermophoresis Influences on Free Convective Heat and Mass Transfer of Viscoelastic Fluid with Hall and Ion-Slip Effects.

“…Analysis of thermophoretic MHD slip flow over a permeable surface has been presented by Das et al [3]. Chamkha et al [4] study the Hall current, thermal radiation, and chemical reaction effects on heat and mass transfer. Hayat and Nawaz [5] have analyzed second-grade fluid flow in three dimensional under the Hall and ion slip effects.…”