THE OSCILLATIONS OF A SPHERE IN A MICROPOLAR FLUID

Abstract

he paper examines the rectilinear oscillation of a sphere along a dimeter and the rotary oscilla- tion of a sphere about a diameter in Eringen’s micropolar fluid. The physical quantities like the velocity, micro-rotation and the stress and couple stress components are calculated. The drag on the rectilinearly oscillating sphere and the couple on the rotational oscillating sphere are calculated. It is observed that over any period of oscillation, the maximum drag or the maximum couple, as the case may be, is larger in the case of micropolar fluids as compared to the Newtonian fluid.