EFFECT OF HEAT SINK ON TRANSIENT MHD MASS TRANSFER FLOW PAST AN ACCELERATED VERTICAL PLATE WITH CHEMICAL REACTION

AbstractAn investigation of unsteady hydromagnetic natural convection heat and mass transfer flow of an electrically conducting, viscous, incompressible and optically thick radiating fluid past an impulsively moving infinite vertical plate embedded in a uniform porous medium in a rotating system with Hall effects in the presence of homogeneous first order chemical reaction is carried out when temperature of the plate has a temporarily ramped profile. Exact solution of the governing equations is obtained in closed form by Laplace transform technique. Expressions for skin friction due to primary and secondary flows and Nusselt number are derived for both ramped temperature and isothermal plates. Expression for Sherwood number is also derived. The numerical values of primary and secondary fluid velocities, fluid temperature and species concentration are displayed graphically whereas those of skin friction are presented in tabular form for various values of pertinent flow parameters. In order to highlight the influence of ramped temperature distribution within the plate on the flow-field, the fluid flow past a ramped temperature plate is compared with the one past an isothermal plate.

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MHD FREE CONVECTION AND MASS TRANSFER FLOW PAST AN ACCELERATED VERTICAL PLATE WITH CHEMICAL REACTION IN PRESENCE OF RADIATION

Latin American Applied Research - An international journal ◽

10.52292/j.laar.2014.412 ◽

2014 ◽

Vol 44 (1) ◽

pp. 1-8

Author(s):

D. SARMA ◽

N. AHMED ◽

H. DEKA

Keyword(s):

Mass Transfer ◽

Chemical Reaction ◽

Vertical Plate ◽

Equations Of Motion ◽

Physical Parameters ◽

Flow Past ◽

Laplace Transform Technique ◽

Transfer Flow ◽

Chemical Reaction Parameter ◽

Rosseland Approximation

This paper deals with the study of the thermal radiation and chemical reaction effects on an unsteady MHD free convective mass transfer flow past an accelerated infinite vertical plate embedded in a porous medium. The Rosseland approximation is used to describe the radiative heat flux in the energy equation. The dimensionless governing equations of motion are solved by using Laplace transform technique in closed form. Expressions for the velocity, temperature and concentration are obtained. The resulting velocity and temperature profiles as well as the skin-friction, rate of heat and mass transfer are shown graphically for different values of the physical parameters viz., Grashof number, Prandtl number, Schmidt number, Chemical reaction parameter, Radiation parameter, Magnetic parameter and Porosity parameter.

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Unsteady MHD Free Convective Heat and Mass Transfer Flow Past a Vertical Porous Plate in the Presence of Radiation and Chemical Reaction

International Journal of Emerging Research in Management and Technology ◽

10.23956/ijermt.v6i10.75 ◽

2017 ◽

Vol 6 (10) ◽

pp. 116

Author(s):

J. Buggaramulu ◽

M. Venkatakrishna ◽

Y. Harikrishna

Keyword(s):

Mass Transfer ◽

Heat And Mass Transfer ◽

Convective Heat ◽

Chemical Reaction ◽

Porous Plate ◽

Physical Parameters ◽

Governing Equations ◽

Vertical Porous Plate ◽

Flow Past ◽

Transfer Flow

The objective of this paper is to analyze an unsteady MHD free convective heat and mass transfer boundary flow past a semi-infinite vertical porous plate immersed in a porous medium with radiation and chemical reaction. The governing equations of the flow field are solved numerical a two term perturbation method. The effects of the various parameters on the velocity, temperature and concentration profiles are presented graphically and values of skin-frication coefficient, Nusselt number and Sherwood number for various values of physical parameters are presented through tables.

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