Turbulent Flows Through a Disk-Type Prosthetic Heart Valve

[+] Author and Article Information
W. J. Yang, J. H. Wang

Department of Mechanical Engineering and Applied Mechanics, The University of Michigan, Ann Arbor, Mich. 48109

J Biomech Eng 105(3), 263-267 (Aug 01, 1983) (5 pages) doi:10.1115/1.3138416 History: Received January 09, 1980; Revised February 23, 1983; Online June 15, 2009


A numerical model is developed to predict the complex velocity, shear and pressure fields in steady turbulent flow through a disk-type prosthetic heart valve in a constant diameter chamber. The governing Navier-Stokes equations are reduced to a set of simultaneous algebraic finite-difference equations which are solved by a fast-converging line-iterations technique. A two-parameter, two-equation model is employed to determine the turbulent viscosity. Numerical results are obtained for stream function, vorticity, and shear and normal stresses. The regions of very high shear and normal stresses in the fluid and at the walls are identified. The maximum value of the shear stress occurring near the upstream corner of the disk may cause hemolysis. The technique can be used together with in-vitro physcial experiments to evaluate existing or future prosthetic heart valve designs.

Copyright © 1983 by ASME
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