Analysis of Yield-Power-Law Fluid Flow in Irregular Eccentric Annuli

[+] Author and Article Information
Q. E. Hussain, M. A. R. Sharif

Department of Aerospace Engineering and Mechanics, Box 870280, The University of Alabama, Tuscaloosa, AL 35487-0280

J. Energy Resour. Technol 120(3), 201-207 (Sep 01, 1998) (7 pages) doi:10.1115/1.2795036 History: Received November 02, 1996; Revised May 07, 1998; Online November 06, 2007


Fully developed laminar axial flow of yield-power-law fluids in eccentric annuli has been investigated numerically. The annuli may be fully open or partially blocked. General nonorthogonal, boundary-fitted curvilinear coordinates have been used to accurately model the irregular annular geometry due to the presence of a flow blockage. A computer code has been developed using a second-order finite-difference scheme. An exponential model for the shear stress, valid for both yielded and un-yielded regions of the flow, is used in the computation. The effects of pressure gradient, eccentricity, and blockage height on the flow rate have been studied and the results are presented. The flow rate is found to increase with increasing eccentricity for eccentric annuli without any blockage. For partially blocked eccentric annuli, the flow rate at a particular eccentricity decreases as the blockage height is increased.

Copyright © 1998 by The American Society of Mechanical Engineers
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