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RESEARCH PAPERS

Three-Dimensional Steady Flow Through A Bifurcation

[+] Author and Article Information
Chain-Nan Yung, Kenneth J. De Witt

Department of Chemical Engineering, University of Toledo, Toledo, Ohio 43606

Theo G. Keith

Department of Mechanical Engineering, University of Toledo, Toledo, Ohio 43606

J Biomech Eng 112(2), 189-197 (May 01, 1990) (9 pages) doi:10.1115/1.2891171 History: Received June 13, 1989; Revised December 13, 1989; Online March 17, 2008

Abstract

Steady flow of an incompressible, Newtonian fluid through a symmetric bifurcated rigid channel was numerically analyzed by solving the three-dimensional Navier-Stokes equations. The upstream Reynolds number ranged from 100 to 1500. The bifurcation was symmetrical with a branch angle of 60 deg and the area ratio of the daughter to the mother vessel was 2.0. The numerical procedure utilized a coordinate transformation and a control volume approach to discretize the equations to finite difference form and incorporated the SIMPLE algorithm in performing the calculation. The predicted velocity pattern was in qualitative agreement with experimental measurements available in the literature. The results also showed the effect of secondary flow which can not be predicted using previous two-dimensional simulations. A region of reversed flow was observed near the outer wall of the branch except for the case of the lowest Reynolds number. Particle trajectory was examined and it was found that no fluid particles remained within the recirculation zone. The shear stress was calculated on both the inner and the outer wall of the branch. The largest wall shear stress, located in the vicinity of the apex of the branch, was of the same order of magnitude as the level that can cause damage to the vessel wall as reported in a recent study.

Copyright © 1990 by The American Society of Mechanical Engineers
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