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

    研究成果: Article

    12 引用 (Scopus)

    抄録

    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.

    元の言語English
    ジャーナルComputers and Fluids
    DOI
    出版物ステータスAccepted/In press - 2018 1 1

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    Unsteady flow
    Computational methods
    Geometry

    ASJC Scopus subject areas

    • Computer Science(all)
    • Engineering(all)

    これを引用

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    title = "Mesh refinement influence and cardiac-cycle flow periodicity in aorta flow analysis with isogeometric discretization",
    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.",
    keywords = "Aorta, Flow periodicity, Higher-order functions, IGA, Isogeometric Analysis, Mesh refinement, Space–Time Variational Multiscale method, ST-VMS",
    author = "Kenji Takizawa and Tezduyar, {Tayfun E.} and Hiroaki Uchikawa and Takuya Terahara and Takafumi Sasaki and Ayaka Yoshida",
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    AU - Takizawa, Kenji

    AU - Tezduyar, Tayfun E.

    AU - Uchikawa, Hiroaki

    AU - Terahara, Takuya

    AU - Sasaki, Takafumi

    AU - Yoshida, Ayaka

    PY - 2018/1/1

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    N2 - 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.

    AB - 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.

    KW - Aorta

    KW - Flow periodicity

    KW - Higher-order functions

    KW - IGA

    KW - Isogeometric Analysis

    KW - Mesh refinement

    KW - Space–Time Variational Multiscale method

    KW - ST-VMS

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