Lie point symmetries for a magneto couple stress fluid in a porous channel with expanding or contracting walls and slip boundary condition | ||
| Journal of the Egyptian Mathematical Society | ||
| Volume 24, Issue 4, 2016, Pages 656-665 PDF (1.07 M) | ||
| DOI: 10.1016/j.joems.2016.04.001 | ||
| Author | ||
| Rabea El Shennawy Abo Elkhair | ||
| Mathematics Department, Faculty of Science, Al-Azhar University, Nasr City, 11448 Cairo, Egypt | ||
| Abstract | ||
| In this paper, an incompressible couple stress fluid flow with magnetic field in a porous channel with expanding or contracting walls and slip boundary condition is considered. Lie group analysis and group invariant solutions are obtained, the governing equations are reduced to nonlinear ordinary differential equations. The resulting equations are solved analytically, also this equations are solved by using Adomian method. The graphs for the axial and the normal velocity components and the pressure distribution for different values of the physical and geometric parameters are plotted and discussed. Finally, the comparison between the analytic and Adomian methods is discussed. It is found that for no-slip case φ = 0 the fluid adheres to the walls and axial velocity is maximum at the center of the channel, also by increasing the slip parameter the velocity at the channel walls increases. However, it decreases at center of the channel by increasing slip parameter. | ||
| Keywords | ||
| Lie point symmetries; Couple stress fluid; Porous channel; Magnetic field; Expanding and contract- ing walls; Slip boundary condition | ||
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