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.
|ジャーナル||Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B|
|出版ステータス||出版済み - 11 2002|
All Science Journal Classification (ASJC) codes