Unsteady flow induced by variable suction on a porous disk rotating eccentrically with a fluid at infinity

A K Ghosh,S Paul,Lokenath Debnath

doi:10.1155/s0161171202008049

Abstract

We study the effect of variable suction or blowing on the flow of an incompressible viscous fluid due to noncoaxial rotations of a porous disk and a fluid at infinity. The inquiries are made about the components of fluid velocity and the shear stress at the disk. It is found that the effect of uniform suction or blowing on the flow is enhanced in the presence of variable suction or blowing.

Highlights

Thornley [5] has studied the unsteady flow developed in an incompressible viscous fluid due to nontorsional oscillations of an infinite rigid plate when both the fluid and the plate are in a state of solid body rotation
Kasiviswanathan and Rao [4] obtained an exact solution for the unsteady flow due to noncoaxial rotations of a porous disk oscillating in its own plane and a fluid at infinity
The flow due to noncoaxial rotations of a porous disk subjected to variable suction or blowing and a fluid at infinity has been investigated

Summary

Introduction

Thornley [5] has studied the unsteady flow developed in an incompressible viscous fluid due to nontorsional oscillations of an infinite rigid plate when both the fluid and the plate are in a state of solid body rotation. The flow due to noncoaxial rotations of a disk and a fluid at infinity was initiated by Berker [1]. Erdogan [2] constructed solutions of the problem of steady flow due to eccentrically rotations of a porous disk and a fluid at infinity with the same angular velocity both for the cases of uniform suction and blowing at the disk.

Results

Conclusion