Resonance of vortex in pulsatile flow through asymmetric stenosis

Takuji Ishikawa, Shuzo Oshima, Ryuichiro Yamane

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

It is well known that fluid dynamical phenomena in arterial blood flow can play an important role in arterial diseases. Flow between flat plates with asymmetric stenosis is analyzed numerically. The fluid is assumed to be Newtonian and incompressible, and the flow is assumed to be periodic in time. It is found that the vortex downstream of asymmetric stenosis becomes strongest at a certain frequency of pulsation. This phenomenon is called vortex resonance in this paper. The flow pattern, the vortex strength and the distributions of wall shear stress are obtained. The results show that the resonance frequency changes with wall configuration and Reynolds number. The vortex resonance occurs where the difference between the adverse pressure and the friction on the wall is maximum.

Original languageEnglish
Pages (from-to)3546-3553
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume65
Issue number639
DOIs
Publication statusPublished - 1999 Nov

Keywords

  • Bio-fluid mechanics
  • Fluid dynamics
  • Numerical analysis
  • Pulsation
  • Vortex

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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