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FLOW OF THE POWERLAW FLUID IN THE INLET REGION OF A DUCT WITH BLOWING OR SUCTION

FLOW OF THE POWERLAW FLUID IN THE INLET REGION OF A DUCT WITH BLOWING OR SUCTION The hydrodynamic development of nonNewtonian fluid flow in the entrance region of a duct with porous walls is examined numerically by solving the modified NavierStokes equations. Cases involving blowing, suction, and no mass transfer through the walls are considered. Velocity distributions, pressure drops, and skin friction coefficients are presents for each case. A definite concavity is found in the velocity profile near the duct entrance for all cases. Results for Newtonian fluids are compared with previous studies in which boundarylayer theory was used. In the region away from the entrance it is found that the present results are in good agreement with previous works. In the region close to the entrance, or in the case of suction, boundarylayer theory is shown to be inappropriate. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Numerical Methods for Heat and Fluid Flow Emerald Publishing

FLOW OF THE POWERLAW FLUID IN THE INLET REGION OF A DUCT WITH BLOWING OR SUCTION

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References (15)

Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0961-5539
DOI
10.1108/eb017499
Publisher site
See Article on Publisher Site

Abstract

The hydrodynamic development of nonNewtonian fluid flow in the entrance region of a duct with porous walls is examined numerically by solving the modified NavierStokes equations. Cases involving blowing, suction, and no mass transfer through the walls are considered. Velocity distributions, pressure drops, and skin friction coefficients are presents for each case. A definite concavity is found in the velocity profile near the duct entrance for all cases. Results for Newtonian fluids are compared with previous studies in which boundarylayer theory was used. In the region away from the entrance it is found that the present results are in good agreement with previous works. In the region close to the entrance, or in the case of suction, boundarylayer theory is shown to be inappropriate.

Journal

International Journal of Numerical Methods for Heat and Fluid FlowEmerald Publishing

Published: Apr 1, 1992

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