Transient fluid–structure coupling for simulation of a trileaflet heart valve using weak coupling

Morsi, Yos S., Yang, William W., Wong, Cynthia S. and Das, Subrat 2007, Transient fluid–structure coupling for simulation of a trileaflet heart valve using weak coupling, Journal of artificial organs, vol. 10, no. 2, pp. 96-103, doi: 10.1007/s10047-006-0365-9.

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Title Transient fluid–structure coupling for simulation of a trileaflet heart valve using weak coupling
Author(s) Morsi, Yos S.
Yang, William W.
Wong, Cynthia S.
Das, Subrat
Journal name Journal of artificial organs
Volume number 10
Issue number 2
Start page 96
End page 103
Total pages 8
Publisher Springer Japan KK
Place of publication Tokyo, Japan
Publication date 2007-06
ISSN 1434-7229
Keyword(s) trileaflet heart valve
computational fluid dynamics
fluid–structure interaction
arbitrary Lagrangian
Eulerian method
wall shear stress
Summary In this article, a three-dimensional transient numerical approach coupled with fluid–structure interaction for the modeling of an aortic trileaflet heart valve at the initial opening stage is presented. An arbitrary Lagrangian–Eulerian kinematical description together with an appropriate fluid grid was used for the coupling strategy with the structural domain. The fluid dynamics and the structure aspects of the problem were analyzed for various Reynolds numbers and times. The fluid flow predictions indicated that at the initial leaflet opening stage a circulation zone was formed immediately downstream of the leaflet tip and propagated outward as time increased. Moreover, the maximum wall shear stress in the vertical direction of the leaflet was found to be located near the bottom of the leaflet, and its value decreased sharply toward the tip. In the horizontal cross section of the leaflet, the maximum wall shear stresses were found to be located near the sides of the leaflet.
Language eng
DOI 10.1007/s10047-006-0365-9
Field of Research 090304 Medical Devices
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2007, The Japanese Society for Artificial Organs
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