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Titolo:
Analysis of blood flow interacted with leaflets in MHV in view of fluid-structure interaction
Autore:
Choi, CR; Kim, CN;
Indirizzi:
Kyunghee Univ, Grad Sch, Dept Engn Mech, Yongin 449701, Kyunggi, South Korea Kyunghee Univ Yongin Kyunggi South Korea 449701 701, Kyunggi, South Korea Kyunghee Univ, Coll Mech & Ind Syst Engn, Yongin 449701, Kyunggi, South Korea Kyunghee Univ Yongin Kyunggi South Korea 449701 701, Kyunggi, South Korea
Titolo Testata:
KSME INTERNATIONAL JOURNAL
fascicolo: 5, volume: 15, anno: 2001,
pagine: 613 - 622
SICI:
1226-4865(200105)15:5<613:AOBFIW>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
AORTIC-VALVE PROSTHESES; HEART-VALVES; INVITRO; DOWNSTREAM; MODEL;
Keywords:
mechanical heart valve (MHV); hemodynamics; fluid-structure interaction; blood flow; pulsatile flow; shear stress; flutter;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Choi, CR Kyunghee Univ, Grad Sch, Dept Engn Mech, 1 Seochon,Kihung, Yongin449701, Kyunggi, South Korea Kyunghee Univ 1 Seochon,Kihung Yongin KyunggiSouth Korea 449701
Citazione:
C.R. Choi e C.N. Kim, "Analysis of blood flow interacted with leaflets in MHV in view of fluid-structure interaction", KSME INT J, 15(5), 2001, pp. 613-622

Abstract

Interaction of blood flow and leaflet behavior in a bileaflet mechanical heart valve was investigated using computational analysis. Blood flows of a Newtonian fluid and a non-Newtonian fluid with Carreau model were modeled as pulsatile, laminar, and incompressible. A finite volume computational fluid dynamics code and a finite element structure dynamics code were used concurrently to solve the flow and structure equations, respectively, where the two equations were strongly coupled. Physiologic ventricular and aortic pressure waveforms were used as flow boundary conditions. Flow fields, leaflet behaviors, and shear stresses with time were obtained for Newtonian and non-Newtonian fluid cases. At the fully opened phase three jets through theleaflets were found and large vortices were present in the sinus area. At the very final stage of the closing phase, the angular velocity of the leaflet was enormously large. Large shear stress was found on leaflet tips and in the orifice region between two leaflets at the final stage of closing phase. This method using fluid-structure interaction turned out to be a useful tool to analyze the different designs of existing and future bileaflet valves.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 12:12:26