Unsteady-Flow Of A Viscous-Fluid Between 2 Parallel Disks With A Time-Varying Gap Width And A Magnetic-Field

Kumari, M and Takhar, HS and Nath, G (1995) Unsteady-Flow Of A Viscous-Fluid Between 2 Parallel Disks With A Time-Varying Gap Width And A Magnetic-Field. In: International Journal Of Engineering Science, 33 (6). pp. 781-791.

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Abstract

The unsteady incompressible viscous fluid flow between two parallel infinite disks which are located at a distance h(t*) at time t* has been studied. The upper disk moves towards the lower disk with velocity h'(t*). The lower disk is porous and rotates with angular velocity Omega(t*). A magnetic field B(t*) is applied perpendicular to the two disks. It has been found that the governing Navier-Stokes equations reduce to a set of ordinary differential equations if h(t*), a(t*) and B(t*) vary with time t* in a particular manner, i.e. h(t*) = H(1 - alpha t*)(1/2), Omega(t*) = Omega(0)(1 - alpha t*)(-1), B(t*) = B-0(1 - alpha t*)(-1/2). These ordinary differential equations have been solved numerically using a shooting method. For small Reynolds numbers, analytical solutions have been obtained using a regular perturbation technique. The effects of squeeze Reynolds numbers, Hartmann number and rotation of the disk on the flow pattern, normal force or load and torque have been studied in detail

Item Type:	Journal Article
Publication:	International Journal Of Engineering Science
Publisher:	Elsavier
Additional Information:	Copyright of this article belongs to Elsavier.
Department/Centre:	Division of Physical & Mathematical Sciences > Mathematics
Date Deposited:	13 Apr 2009 07:20
Last Modified:	31 Mar 2011 09:42
URI:	http://eprints.iisc.ac.in/id/eprint/19300

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