Resonance of vortex in blood flow through stenosed tube

Takuji Ishikawa, Shuzo Oshima, Ryuichiro Yamane

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

It is well known that the fluid dynamics of arterial blood flow play an important role in arterial disease. Periodic blood flow through a stenosed tube and a locally expanded tube was analyzed numerically. The fluid is assumed to be non-Newtonian, and the flow is assumed to be periodic, incompressible and axisymmetric. It is found that the vortex downstream of stenosis or expansion is strongest at a certain frequency, which is called resonance of vortex. The flow pattern, separated region and the distributions of pressure and shear stress at the wall are obtained. The results show that the resonance of vortex, which has great influence on the physical quantity of flow at the wall, occurs in both tubes. The mechanism of the resonance of vortex can be explained by a balance of forces between pressure and friction at the wall.

Original languageEnglish
Pages (from-to)387-395
Number of pages9
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume63
Issue number606
DOIs
Publication statusPublished - 1997 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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