Viscoelastic Ekman layer on a porous plate

An investigation is made on the steady flow of a viscoelastic fluid bounded by a porous plate with uniform suction or blowing. Both the plate and the fluid are in a state of solid body rotation with constant angular velocity about the z-axis normal to the plate. Exact solutions of the problem corresponding to values of elastic parameter T > 1 and T < 1 are obtained. The structure of the associated boundary layer in each case is determined. The effects of the elastic parameter (T) in presence of uniform suction (or blowing) and rotation on the flow phenomena are analysed. Several new results of interest are obtained; some of these results contradict the findings of previous workers while others confirm them in a particular situation. (author)