Time-accurate, fully 3D numerical simulations and particle image velocity laboratory experiments are carried out for flow through a fully open bileaflet mechanical heart valve under steady (nonpulsatile) inflow conditions. Flows at two different Reynolds numbers, one in the laminar regime and the other turbulent (near-peak systole flow rate), are investigated. A direct numerical simulation is carried out for the laminar flow case while the turbulent flow is investigated with two different unsteady statistical turbulence modeling approaches, unsteady Reynolds-averaged Navier-Stokes (URANS) and detached-eddy simulation (DES) approach. For both the laminar and turbulent cases the computed mean velocity profiles are in good overall agreement with the measurements. For the turbulent simulations, however, the comparisons with the measurements demonstrate clearly the superiority of the DES approach and underscore its potential as a powerful modeling tool of cardiovascular flows at physiological conditions. The study reveals numerous previously unknown features of the flow.
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October 2005
Technical Papers
Flow in a Mechanical Bileaflet Heart Valve at Laminar and Near-Peak Systole Flow Rates: CFD Simulations and Experiments
Liang Ge,
Liang Ge
Postdoctoral Fellow
(404) 385-0530
(404) 385-1131
School of Civil and Environmental Engineering,
e-mail: lg65@mail.gatech.edu
Georgia Institute of Technology
, Atlanta, GA 30332-0335
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Hwa-Liang Leo,
Hwa-Liang Leo
Ph.D. Student
Walter H. Coulter School of Biomedical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0535
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Fotis Sotiropoulos,
Fotis Sotiropoulos
Professor
School of Civil and Environmental Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0335
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Ajit P. Yoganathan
Ajit P. Yoganathan
Regents Professor
Walter H. Coulter School of Biomedical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0535
Search for other works by this author on:
Liang Ge
Postdoctoral Fellow
(404) 385-0530
(404) 385-1131
School of Civil and Environmental Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0335e-mail: lg65@mail.gatech.edu
Hwa-Liang Leo
Ph.D. Student
Walter H. Coulter School of Biomedical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0535
Fotis Sotiropoulos
Professor
School of Civil and Environmental Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0335
Ajit P. Yoganathan
Regents Professor
Walter H. Coulter School of Biomedical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0535J Biomech Eng. Oct 2005, 127(5): 782-797 (16 pages)
Published Online: March 31, 2005
Article history
Received:
December 14, 2004
Revised:
March 31, 2005
Citation
Ge, L., Leo, H., Sotiropoulos, F., and Yoganathan, A. P. (March 31, 2005). "Flow in a Mechanical Bileaflet Heart Valve at Laminar and Near-Peak Systole Flow Rates: CFD Simulations and Experiments." ASME. J Biomech Eng. October 2005; 127(5): 782–797. https://doi.org/10.1115/1.1993665
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