• UNSTEADY OSCILLATORY MHD FLOW OF A VISCO-ELASTIC FLUID PAST A POROUS VERTICAL PLATE WITH PERIODIC SUCTION

Abstract

The two dimensional oscillatory MHD flow of a visco-elastic incompressible electrically conducting fluid past a porous vertical plate with periodic suction when the free stream velocity and temperature vary periodically with time has been investigated analytically. A magnetic field of uniform strength is transversely applied to the plate. The magnetic Reynolds number is assumed to be small so that the induced magnetic field can be neglected. The multi-parameter perturbation scheme is used to solve the governing equations. The expression for dimensionless velocity, temperature and skin friction at the plate has been obtained and numerically worked out for different values of flow parameters involved in the solution. The dimensionless velocity has been presented graphically and skin friction at the plate has been presented numerically for various values of visco-elastic parameter with the combination of other flow parameters.