Wall shear stress and flow pattern with initiation of aneurysm around anterior communicating artery in steady flow

Ryuhei Yamaguchi, Susumu Kudo, Nobuhiko Nakazawa, Mikio Nakashima, Hiroahi Ujiie

Research output: Contribution to journalArticle


In the present paper, the change of flow structure such as the wall shear stress at the apex of the anterior communicating artery with the initiation of aneurysm is described in steady flow. The anterior communicating artery composing the circle of Willis is one of the predilection sites where the cerebral aneurysm occurs frequently. The flow field around the anterior communicating artery is simulated by two confluent tubes joining at the angle of 60 degrees, two parallel bifurcating tubes, and the junctional tube, bypass, connecting four tubes at normal condition. Once the small aneurysm initiates at the apex in one confluent tube with much flow rate, the distribution of wall shear stress abruptly changes around the initial aneurysm. This change may induce the progressive development of aneurysm. The relation between the initiation and the development of aneurysm is physiologically discussed from the viewpoint of hemodynamics.

Original languageEnglish
Pages (from-to)3006-3011
Number of pages6
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Issue number675
Publication statusPublished - Nov 2002
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

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