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

Research output: Contribution to journalArticle

26 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

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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