Closure to “Discussion of ‘Unsteady Flow in a Porous Medium Between Two Infinite Parallel Plates in Relative Motion’” (1986, ASME J. Fluids Eng., 108, p. 489)

1986 ◽  
Vol 108 (4) ◽  
pp. 489-489
Author(s):  
V. M. Soundalgekar ◽  
H. S. Takhar ◽  
M. Singh
Keyword(s):  
Porous Medium ◽  
Unsteady Flow ◽  
Relative Motion ◽  
Parallel Plates

Unsteady Flow in a Porous Medium Between Two Infinite Parallel Plates in Relative Motion

1985 ◽  
Vol 107 (4) ◽  
pp. 534-535 ◽  
Author(s):  
V. M. Soundalgekar ◽  
H. S. Takhar ◽  
M. Singh
Keyword(s):  
Porous Medium ◽  
Approximate Solution ◽  
Unsteady Flow ◽  
Incompressible Fluid ◽  
Phase Angle ◽  
Viscous Incompressible Fluid ◽  
Parallel Plates ◽  
Phase Lead ◽  
Permeability Parameter ◽  
Transient Velocity

An approximate solution to the unsteady flow of a viscous incompressible fluid through a porous medium bounded by two infinite parallel plates, the lower one stationary and the upper one oscillating in its own plane, is presented here. Expressions for the transient velocity, the amplitude, the phase angle α and the skin-friction are derived and numerically calculated. It is observed that the amplitude increases with increasing σ, the permeability parameter, and ω, the frequency. Also, there is always a phase lead, and the phase angle α decreases with increasing σ.

Effect of Crossflow on Oscillatory Flow in a Porous Medium Between Two Parallel Plates in Relative Motion

1991 ◽  
Vol 113 (1) ◽  
pp. 151-154
Author(s):  
V. Kumaran ◽  
G. Ramanaiah
Keyword(s):  
Porous Medium ◽  
Skin Friction ◽  
Relative Motion ◽  
Analytical Solutions ◽  
Oscillatory Flow ◽  
The Other ◽  
Parallel Plates ◽  
Moving Plate ◽  
Flow Parameters ◽  
Flow Through

This paper deals with the incompressible flow through a porous medium bounded by two parallel permeable plates, one of which is stationary and the other slides and oscillates in its own plane. Also uniform crossflow is superimposed through the plates. Analytical solutions for flow parameters are obtained. The effect of crossflow, permeability, and the frequency of the moving plate on the velocity, skin friction has been investigated. It is shown that skin friction can be reduced considerably by injection at the lower plate.

Calculation of two-dimensional dispersion in a gas in unsteady flow in a porous medium

1983 ◽  
Vol 17 (5) ◽  
pp. 704-710
Author(s):  
E. G. Basanskii ◽  
V. M. Kolobashkin ◽  
N. A. Kudryashov
Keyword(s):  
Porous Medium ◽  
Unsteady Flow ◽  
Two Dimensional

Forced Convection in a Channel Filled With Porous Medium, Including the Effects of Flow Inertia, Variable Porosity, and Brinkman Friction

1987 ◽  
Vol 109 (4) ◽  
pp. 880-888 ◽  
Author(s):  
D. Poulikakos ◽  
K. Renken
Keyword(s):  
Porous Medium ◽  
Forced Convection ◽  
Flow Model ◽  
Saturated Porous Medium ◽  
Porous Matrix ◽  
Parallel Plates ◽  
Entry Length ◽  
Variable Porosity ◽  
Flow Inertia ◽  
Temperature And Flow Fields

This paper presents a series of numerical simulations which aim to document the problem of forced convection in a channel filled with a fluid-saturated porous medium. In modeling the flow in the channel, the effects of flow inertia, variable porosity and Brinkman friction are taken into account. Two channel configurations are investigated: parallel plates and circular pipe. In both cases, the channel wall is maintained at constant temperature. It is found that the general flow model predicts an overall enhancement in heat transfer between the fluid/porous matrix composite and the walls, compared to the predictions of the widely used Darcy flow model. This enhancement is reflected in the increase of the value of the Nusselt number. Important results documenting the dependence of the temperature and flow fields in the channel as well as the dependence of the thermal entry length on the problem parameters are also reported in the course of the study.

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