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A class of exact solutions for the incompressible viscous magnetohydrodynamic flow over a porous rotating disk

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Abstract

The present paper is concerned with a class of exact solutions to the steady Navier-Stokes equations for the incompressible Newtonian viscous electrically conducting fluid flow due to a porous disk rotating with a constant angular speed. The three-dimensional hydromagnetic equations of motion are treated analytically to obtained exact solutions with the inclusion of suction and injection. The well-known thinning/thickening flow field effect of the suction/injection is better understood from the constructed closed form velocity equations. Making use of this solution, analytical formulas for the angular velocity components as well as for the permeable wall shear stresses are derived. Interaction of the resolved flow field with the surrounding temperature is further analyzed via the energy equation. The temperature field is shown to accord with the dissipation and the Joule heating. As a result, exact formulas are obtained for the temperature field which take different forms corresponding to the condition of suction or injection imposed on the wall.

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  1. Mathematics Department, University of Hacettepe, 06532, Beytepe, Ankara, Turkey

    M. Turkyilmazoglu

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Turkyilmazoglu, M. A class of exact solutions for the incompressible viscous magnetohydrodynamic flow over a porous rotating disk. Acta Mech Sin 28, 335–347 (2012). https://doi.org/10.1007/s10409-012-0042-6

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  • DOI: https://doi.org/10.1007/s10409-012-0042-6

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