A Computer Simulation of the Blood Flow at the Aortic Bifurcation With Flexible Walls

[+] Author and Article Information
Zheng Lou

Transportation Research Institute, University of Michigan, Ann Arbor, MI 48109

Wen-Jei Yang

Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, MI 48109

J Biomech Eng 115(3), 306-315 (Aug 01, 1993) (10 pages) doi:10.1115/1.2895491 History: Received June 20, 1991; Revised August 13, 1992; Online March 17, 2008


To understand the role of fluid dynamics in atherogenesis, especially the effect of the flexibility of arteries, a two-dimensional numerical model for blood flow at the aortic bifurcation with linear viscoelastic walls is developed. The arbitrary Lagrangian-Eulerian method is adopted to deal with the moving boundary problem. The wall expansion induces flow reversals or eddies during the decelerating systole while the wall contraction restricts them during the diastole. A flexible bifurcation experiences the shear stresses about 10 percent lower than those of a rigid one.

Copyright © 1993 by The American Society of Mechanical Engineers
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