Hall and Rotation Effects on Radiating and Reacting MHD Flow past an Accelerated Permeable Plate with Soret and Dufour Effects

Abstract

This article investigates numerically the effects of Hall current and rotation effects on radiating and chemically reacting unsteady MHD natural convection flow past an accelerated infinite vertical permeable plate in the presence of Soret and Dufour effects. The dimensionless coupled non-linear governing partial differential equations of the problem are solved numerically by employing finite element method. The influence of various physical parameters influencing the flow on the primary velocity, secondary velocity, temperature and the species concentration are displayed graphically whilst the numerical results of the primary skin friction, secondary skin-friction, Nusselt number and the Sherwood number are presented in tabular form. Results reveals that magnetic parameter, radiation parameter and chemical reaction rate tends to depreciate both primary and secondary velocity components whilst Hall, Soret and Dufour effects have reverse trend. Rotation parameter tends to retard fluid flow in the primary flow direction and accelerate fluid flow in the secondary flow direction. Thermal boundary layer thickness decreases with increasing radiation parameter whilst the reverse trend is noticed with increasing Dufour effect. Thermal diffusion effect causes to improve concentration boundary layer thickness whilst chemical reaction rate has reverse impact. These parameters have similar effect on the primary and secondary skin-frictions whilst opposite effect was noticed on the Nusselt and Sherwood numbers. This model problem finds an important in engineering and industrial application such as MHD generators, food processing, heat exchangers devices and internal rotation rate of the sun.
 HIGHLIGHTS
 
 The problem investigate the effects of Hall current and rotation effects on radiating and reacting on unsteady magnetohydrodynamics (MHD) natural convection heat and mass transfer flow over an infinite vertical porous plate embedded in a uniform porous medium taking Soret and Dufour effects into account
 The resulting partial differential equations governing the fluid flow are solved numerically using the finite element method. In order to determine the effects of various pertinent parameters and to investigate the important flow features, the numerical calculations for fluid velocity, temperature and species concentration are computed and shown graphically whereas skin friction, Nusselt number and Sherwood number at the plate are evaluated and depicted in tabular form
 The model problem finds an important in engineering and industrial application
 
 GRAPHICAL ABSTRACT

Hall and viscous dissipation effects on mixed convective MHD heat absorbing flow due to an impulsively moving vertical porous plate with ramped surface temperature and concentration

“…The impacts of Hall and ion slip on nanofluid magneto-titanium alloys with radiation retention and diffusion thermo were discussed by Dharmaiah et al [35]. Recently, Matao et al [36] peered at Hall and rotation impacts on MHD reacting and radiating flow via porous surfaces with Dufour and Soret effects.…”

“…Recently, Matao et al. [36] peered at Hall and rotation impacts on MHD reacting and radiating flow via porous surfaces with Dufour and Soret effects.…”

Effects of Soret and Dufour on Unsteady Magneto-Convective Transport through a Vertical Perforated Sheet with Chemical Reaction

“…The properties of Soret and Dufour on a time-dependent MHD natural convective transportation onto a vertical sheet in a saturated permeable medium were initially outlined by Postelnicu [9]. Matao et al [10] looked into the consequences of rotation and Hall current on an unstable MHD natural convection transfer of heat and mass movement passing an extended infinite vertical perforated plate with Soret and Dufour characteristics. Jamir and Konwar [11] looked into the impacts of the applied heat source, viscous dissipation, and Soret and Dufour with radiation absorption.…”