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Numerical coupling of fluid and structure in cardiac flow and devices

Avrahami, Idit (2006) Numerical coupling of fluid and structure in cardiac flow and devices. In: 2006 International Conference on Information and Technology. IEEE , Piscataway, NJ, p. 115. ISBN 978-1-4244-0858-0. https://resolver.caltech.edu/CaltechAUTHORS:20110128-140817342

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Abstract

Numerical simulations are a powerful tool in investigation of flow and structure dynamics in biological systems and in the design of biomedical devices. Time-dependent fluid-structure interaction (FSI) problems in biological systems are often characterized by a periodic nature and relatively low Reynolds number. In order to solve the dynamics of the fluid and structure of coupled systems, different approaches may be used. Several parameters such as geometrical complexity, degree of displacement, convergence to steady periodicity, and the system stability may determine the coupling method. In the talk, four numerical studies of biological and implanted systems will be presented, each with a different FSI approach. The first study is of flow through mechanical heart valves, using finite-volume (FV) fluid solver coupled with an external structural solver using a weak coupling scheme for large displacements. The second study is of flow inside a pulsatile ventricular assist device with FV fluid solver coupled with finite-element (FE) structure solver using a strong staggered coupling assuming small displacements. The third study is of flow through vulnerable plaque in the coronary arteries, with FE solvers for both the fluid and structure domains, using a fully-coupled iterative scheme assuming small displacements. The fourth simulation is of an impedance pump using a direct FE coupling method for large displacements. In addition to the methodology, the applicative design and hemodynamic aspects of the cases will be discussed, including washout properties and risk for thrombosis. The results obtained from the studies will be compared to experimental analyses.


Item Type:Book Section
Related URLs:
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http://dx.doi.org/10.1109/ITRE.2006.381545 DOIUNSPECIFIED
http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4266306PublisherUNSPECIFIED
Additional Information:© 2006 IEEE. Issue Date: 16-19 Oct. 2006. Date of Current Version: 02 July 2007.
Record Number:CaltechAUTHORS:20110128-140817342
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20110128-140817342
Official Citation:Avrahami, Idit; , "Numerical Coupling of Fluid and Structure in Cardiac Flow and Devices," Information Technology: Research and Education, 2006. ITRE '06. International Conference on , vol., no., pp.115, 16-19 Oct. 2006 doi: 10.1109/ITRE.2006.381545 URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4266306&isnumber=4266278
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21921
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:09 Feb 2011 23:32
Last Modified:03 Oct 2019 02:31

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