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Content available remote Radiation and thermal diffusion effects on MHD unsteady Maxwell fluid past a porous flat through porous medium
Eldabe N. T. M., Hassan A. A. A, Ghaly A. Y.
Mechanics and Mechanical Engineering
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2004
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Vol. 7, nr 2
153-163
EN
Radiation and thermal diffusion effects of magnetohydrodynamic flow for non Newtonian fluid through a porous medium past an infinite porous flat plate arc presented. The flow under consideration obeys Maxwell rheological model. Solutions for velocity, temperature and concentration distributions arc obtained with the help of finite difference method. The effects of various parameters such as relaxation parameter λ of the Maxwell fluid, permeability of the fluid K, magnetic parameter M, Dufour number Df, Soret number Sr, Prandtl number Pr, radiation parameter N and Schmidt number Sc on the velocity, temperature and concentration profiles are studied and illustrated graphically. We obtained also the rate of heat transfer and concentration gradient during the course of discussion.
2
Content available remote Oscillatory non-Newtonian viscoelastic fluid flow past a porous bed
Eldabe N. T. M., Sallam S. N., Ghaly A. Y.
Mechanics and Mechanical Engineering
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2004
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Vol. 7, nr 2
131-144
EN
An analytical study has been performed to evaluate the flow of viscoelastic fluid through and past an infinite porous bed. A most general form of Darcy law has been taken into account when the free stream oscillates with or without a non-zero mean. In modeling the flow in the bed a separation of variable technique was utilized to represent the governing equations with appropriate boundary layer assumption. The effect of flow inertia was taken into consideration. Results obtained include velocity distributions of the fluid in the bed. The dependence of velocity profile on elasticity parameter of the fluid and permeability parameter of the medium with the variation of the time and position was also obtained and discussed graphically.
3
Content available remote Pulsatile flow of electrically conducting non-Newtonian fluid and heat transfer through porous medium in a circular pipe
Eldabe N. T. M., Ghaly A. Y., El-hassan M., Oaf M. E.
Mechanics and Mechanical Engineering
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2001
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Vol. 5, nr 1
5-20
EN
The influence of elasticity and magnetic field on pulastile viscoelastic flow and heat transfer in a circular pipe is examined. By means of the perturbation method of the velocity and temperature fields, the analytical solution of the velocity and temperature are obtained in terms of Bessel and hypergeometric functions .The discharge and the rate of heat transfer are determined through the course of discussions.
4
Content available remote Hall effect on magnetohydrodynamic viscoelastic free convection flow with mass transfer through a porous medium near an infinite vertical porous plate
Eldabe N. T. M. N. T. M., Ghaly A. Y., Saddeek G., Hassan M. A.
Mechanics and Mechanical Engineering
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2001
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Vol. 5, nr 2
185-201
EN
The present study is devoted to investigate the influences of hall current on unsteady free convection flow of magnetohydrodynamic non-Newtonian viscoelastic incompressible fluid with mass transfer over an infinite vertical porous plate. The system is stressed by uniform magnetic field acting in a plane, which makes an angle α with the plane transverse to the plate over an infinite vertical porous plate. The Walter's model is used to characterize the non-Newtonian fluid behavior. Similarity solution for the transformed governing equations is obtained with prescribed variable suction velocity. Numerical results for the details of the velocity, temperature and concentration profiles are shown on graphs. Excess surface temperature as well as concentration gradient at the wall have been presented for different values of the elasticity parameter n0, magnetic parameter M, Schmidt number Sc, Grashof number Gr, modified Grashof number Gc, Hall parameter m, Dufour number Df, Soret number Sr and permeability parameter k*.
5
Content available remote Free-convection magnetohydrodynamic flow for non-Newtonian fluid past porous flat plate
Eldabe N. T. M., Ghaly A. Y., Saddeek G., Hassan M. A.
Mechanics and Mechanical Engineering
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2001
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Vol. 5, nr 2
223-236
EN
In this paper the steady motion of an electrically conducting, viscous and incompressible non-Newtonian fluid past a porous flat plate under a transverse magnetic filed is considered. Analytically expressions for the velocity, temperature, skin friction and magnetic induction have been obtained by using the perturbation technique. Our results are compared with the previous ordinary Newtonian fluid results. The results have been shown graphically, and the effect of different parameters on the velocity, the magnetic induction, coefficient of skin friction and temperature are discussed in these cases.
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