Mesh refinement influence and cardiac-cycle flow periodicity in aorta flow analysis with isogeometric discretization

Kenji Takizawa, Tayfun E. Tezduyar, Hiroaki Uchikawa, Takuya Terahara, Takafumi Sasaki, Ayaka Yoshida

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    22 Citations (Scopus)

    Abstract

    We present detailed studies on mesh refinement influence and cardiac-cycle flow periodicity in aorta flow analysis with isogeometric discretization. Both factors play a key role in the reliability and practical value of aorta flow analysis. The core computational method is the space–time Variational Multiscale (ST-VMS) method. The other key method is the ST Isogeometric Analysis (ST-IGA). The ST framework, in a general context, provides higher-order accuracy. The VMS feature of the ST-VMS addresses the computational challenges associated with the multiscale nature of the unsteady flow in the aorta. The ST-IGA provides smoother representation of the aorta and increased accuracy in the flow solution. We conduct the studies for a patient-specific aorta geometry. We determine the level of mesh refinement needed and assess the nature of the flow periodicity reached.

    Original languageEnglish
    JournalComputers and Fluids
    DOIs
    Publication statusAccepted/In press - 2018 Jan 1

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    Keywords

    • Aorta
    • Flow periodicity
    • Higher-order functions
    • IGA
    • Isogeometric Analysis
    • Mesh refinement
    • Space–Time Variational Multiscale method
    • ST-VMS

    ASJC Scopus subject areas

    • Computer Science(all)
    • Engineering(all)

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