Finite element solution of micropolar fluid flow from an enclosed rotatingdisc with suction and injection

The steady flow of a micropolar fluid over a finite rotating disc enclosed within a coaxial cylindrical casing has been studied. The governing equatio ns were solved numerically by using the finite element method. Maximum valu es xi (1) and xi (2) of the dimensionless radial distance at which there is no-recirculation for the cases of net radial outflow and net radial inflow respectively, increase with an increase in the micropolar effects. The vel ocities at xi (1) and xi (2) as well as at some fixed radii have been calcu lated and the associated phenomena of no-recirculation/recirculation is dis cussed. The change in the flow phenomenon due to a reversal of the directio n of the net radial flow has also been studied. (C) 2001 Published by Elsev ier Science Ltd.