Unsteady magnetohydrodynamic micropolar fluid flow and heat transfer over a vertical porous plate through a porous medium in the presence of thermal and mass diffusion with a constant heat source

2004 ◽  
Vol 82 (10) ◽  
pp. 775-790 ◽  
Author(s):  
F S Ibrahim ◽  
I A Hassanien ◽  
A A Bakr
Keyword(s):  
Porous Medium ◽  
Heat Source ◽  
Micropolar Fluid ◽  
Porous Plate ◽  
Skin Friction Coefficient ◽  
Temperature Fields ◽  
Vertical Porous Plate ◽  
Method Of Solution ◽  
Constant Suction ◽  
Set Up

In this work, the effects of a temperature-dependent heat source on the hydromagnetic free-convective flow (set up due to temperature as well as species concentration) of an electrically conducting micropolar fluid past a steady vertical porous plate through a highly porous medium has been analyzed when the free stream oscillates in magnitude. A uniform magnetic field acts perpendicularly to the porous surface, which absorbs the micropolar fluid with constant suction velocity. The method of solution can be applied for a small perturbation approximation. The numerical results of velocity and temperature distributions of micropolar fluids are compared with the corresponding flow problems for a Newtonian fluid. The effects of the material parameters on velocity, angular momentum, concentration, and temperature fields across the boundary layer are investigated. In addition, the skin-friction coefficient and Nusselt number are shown in tabular form.PACS Nos.: 44.05.+e, 44.30.+v, 47.11.+j, 47.27.Te, 47.55.Mh, 47.65.+a, 47.50.+d

scholarly journals MHD Flow of Micropolar Fluid via Porous Medium Within the Rotating Frame of Reference

2021 ◽  
Vol 8 (1) ◽  
pp. 25-32
Author(s):  
Sachidananda Sahoo ◽  
Kishore Kumar Prusty ◽  
Satyaranjan Mishra
Keyword(s):  
Porous Medium ◽  
Micropolar Fluid ◽  
Fluid Motion ◽  
Mhd Flow ◽  
Skin Friction Coefficient ◽  
Rotating Frame ◽  
Fluid Concentration ◽  
Constant Suction ◽  
Flow Phenomena ◽  
First Order Chemical Reaction

The present study reveals the heat and mass transfer on the MHD flow of micropolar fluid in a porous medium within a rotating frame. In order to facilitate osillatory plate velocity with constant suction and first order chemical reaction has been considered. Using small perturbation approximation, the governing non-dimensional equations are solved. The influence of pertinent physical quantities on the flow phenomena have been presented graphically. The skin friction coefficient, wall couple stress, Nusselt and Sherwood number have also computed for different flow parameters and have presented in table. In the study, the applied magnetic field sets in to produce the resistive force i.e. the Lorentz force that resists the fluid motion throughout the domain. Attenuation in the Prandtl number is because of the slower thermal diffusivity resulted in a sharp reduction in the thermal boundary layer thickness. The retardation in the polar fluid concentration is greater in amount for the influence of heavier species.

scholarly journals Chemical reaction effect on an unsteady MHD free convection flow past an infinite vertical porous plate with constant suction

2011 ◽  
Vol 17 (3) ◽  
pp. 249-257 ◽  
Author(s):  
Rao Anand ◽  
S. Shivaiah
Keyword(s):  
Free Convection ◽  
Chemical Reaction ◽  
Porous Plate ◽  
Skin Friction Coefficient ◽  
Convection Flow ◽  
Physical Parameters ◽  
Governing Equations ◽  
Vertical Porous Plate ◽  
Flow Past ◽  
Constant Suction

This paper focuses on the effects of chemical reaction on an unsteady magneto hydrodynamic free convection fluid flow past an infinite vertical porous plate with constant suction has been analyzed. The dimensionless governing equations are solved numerically by a finite element method. The effects of the various parameters on the velocity, temperature and concentration profiles are presented graphically and values of skin-friction coefficient, Nusselt number and Sherwood number for various values of physical parameters are presented through tables.

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