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3 International Journal of Applied Mechanics and Engineering

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Hall effects on oscillatory Couette flow

Ghara N., Maji S. L., Das S., Jana R. N.

International Journal of Applied Mechanics and Engineering

2011

Vol. 16, no 4

1005-1020

Hall effects on the oscillatory Couette flow between two horizontal parallel plates are studied. One of the plate is at rest and the other one oscillates in its own plane. The effects of Hall and frequency parameters on the velocities and the shear stresses for the steady and unsteady flows are analyzed. It is found that the shear stresses at the M stationary plate due to the unsteady primary and secondary velocities have a phase lag over the plate oscillations for those values of the Hall parameter m, Hartmann number and the frequency parameter , we have considered.

Hydrodynamic flow through porous medium between two porous disks rotating about non-coincident axes

Maji S. L., Guria M., Manna G., Jana R. N.

International Journal of Applied Mechanics and Engineering

2009

Vol. 14, no 1

239-250

A hydrodynamic viscous incompressible fluid flow through a porous medium between two porous disks rotating with same angular velocity [...] about two non-coincident axes has been studied. An exact solution of the governing equations has been obtained in a closed form. It is found that the primary velocity [...] increases and the secondary velocity [...] decreases with an increase in either the Reynolds number Re or porosity parameter [...]. It is also found that the torque at the disks [...] and [...] decreases with an increase in either [...] or . The heat transfer haracteristic has also been studied on taking viscous dissipation into account. It is found that the rate of heat transfer at both the disks [...] and [...] decreases with an increase in [...].

Unsteady hydrodynamic flow between two disks with non-coincident parallel axes of rotation

Manna G., Maji S. L., Guria M., Jana R. N.

International Journal of Applied Mechanics and Engineering

2008

Vol. 13, no 4

967-978

An unsteady flow of a viscous incompressible fluid between two disks with reference to non-coaxial parallel axes of rotation has been studied. It is rigorously stated that there arises an axisymmetric solution of this problem in the case of a rigid body rotation. An exact solution of the governning equations has been obtained by applying the Laplace transform technique. The torque, required to overcome the transverse shearing stress on a disk, has also been calculated. It is found that the torque obtained from the general solution on the disks decreases with an increase in time. On the other hand, for small time the torque on the disks increases with an increase in time.