Oscillatory flow of dipolar fluids between parallel plates

Abstract

The oscillatory flow of an incompressible dipolar fluid under isothermal conditions between parallel plates is studied. It is found that the velocity field is governed by two parameters characterising the fluid; and that for small frequencies the velocity is in phase with the exciting pressure gradient and the effect of dipolar inertia terms is negligible. For large frequencies, the flow has a boundary layer character and it is affected by both the parameters. Outside the layer there is a core about the axis in which the flow is affected only by the dipolar inertia terms.