Unsteady hydromagnetic Couette flow through a porous medium in a rotating system

Abstract

This paper investigates the unsteady hydromagnetic Couette fluid flow through a porous medium between two infinite horizontal plates induced by the non-torsional oscillations of one of the plates in a rotating system using boundary layer approximation. The fluid is assumed to be Newtonian and incompressible. Laplace transform technique is adopted to obtain a unified solution of the velocity fields. Such a flow model is of great interest, not only for its theoretical significance, but also for its wide applications to geophysics and engineering. Analytical expressions for the steady state velocity and shear stress on the plates are obtained, and the case of single oscillating plate is also discussed. The influence of pertinent parameters on the flow is delineated, and appropriate conclusions are drawn.

Double-diffusive convection of compressible rotating Walters’ (B′) fluid with Hall currents saturating a porous medium

“…Numerous problems on effect of Hall currents under varying assumptions of hydrodynamics and hydromagnetics for Newtonian fluids have been attempted by many researchers in the past, e.g. Gupta (1967), Sharma and Gupta (1990), Sharma and Sunil (1995), Chauhan and Agrawal (2011), Guchhait et al(2011) and Prasad and Kumar (2012) to name a few among several others. In all the above mentioned studies, fluids have been considered to be Newtonian.…”