Space–time fluid mechanics computation of heart valve models

Kenji Takizawa, Tayfun E. Tezduyar, Austin Buscher, Shohei Asada

    Research output: Contribution to journalArticle

    68 Citations (Scopus)

    Abstract

    Fluid mechanics computation of heart valves with an interface-tracking (moving-mesh) method was one of the classes of computations targeted in introducing the space–time (ST) interface tracking method with topology change (ST-TC). The ST-TC method is a new version of the Deforming-Spatial-Domain/Stabilized ST (DSD/SST) method. It can deal with an actual contact between solid surfaces in flow problems with moving interfaces, while still possessing the desirable features of interface-tracking methods, such as better resolution of the boundary layers. The DSD/SST method with effective mesh update can already handle moving-interface problems when the solid surfaces are in near contact or create near TC, if the “nearness” is sufficiently “near” for the purpose of solving the problem. That, however, is not the case in fluid mechanics of heart valves, as the solid surfaces need to be brought into an actual contact when the flow has to be completely blocked. Here we extend the ST-TC method to 3D fluid mechanics computation of heart valve models. We present computations for two models: an aortic valve with coronary arteries and a mechanical aortic valve. These computations demonstrate that the ST-TC method can bring interface-tracking accuracy to fluid mechanics of heart valves, and can do that with computational practicality.

    Original languageEnglish
    Pages (from-to)973-986
    Number of pages14
    JournalComputational Mechanics
    Volume54
    Issue number4
    DOIs
    Publication statusPublished - 2014 Oct 1

    Fingerprint

    Fluid Mechanics
    Fluid mechanics
    Interface Tracking
    Space-time
    Moving Interface
    Contact
    Model
    Moving Mesh Method
    Interface Problems
    Coronary Artery
    Boundary layers
    Topology
    Heart
    Boundary Layer
    Update
    Mesh
    Demonstrate

    Keywords

    • Contact
    • DSD/SST method
    • Fluid mechanics computation
    • Heart valves
    • Moving-mesh method
    • Space–time interface-tracking
    • ST-TC method
    • Topology change

    ASJC Scopus subject areas

    • Computational Theory and Mathematics
    • Mechanical Engineering
    • Ocean Engineering
    • Applied Mathematics
    • Computational Mathematics

    Cite this

    Space–time fluid mechanics computation of heart valve models. / Takizawa, Kenji; Tezduyar, Tayfun E.; Buscher, Austin; Asada, Shohei.

    In: Computational Mechanics, Vol. 54, No. 4, 01.10.2014, p. 973-986.

    Research output: Contribution to journalArticle

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