Effect of a Magnetic Field on a Micropolar Fluid Flow in the Vicinity of an Axisymmetric Stagnation Point on a Circular Cylinder

摘要

The effect of a magnetic field on a micropolar fluid flow in the vicinity of an axi-symmetric stagnation point on a circular cylinder is studied numerically. The governing conservation equations of continuity,momentum and angular momentum are partial differential equations which are transformed into a system of ordinary differential equations by using the usual similarity transformations. The resulting system of coupled non-linear ordinary differential equations is solved numerically by using the shooting method. The numerical results indicate the velocity,angular velocity and pressure distributions for different parameters of the problem including Reynolds number,magnetic parameter and dimensionless material properties,etc. In addition,the effect of the pertinent parameters on the local skin friction coefficient and the couple stress are discussed numerically and illustrated graphically.