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Analysis for the Flow and Wall Shear Stress with the Diameter Ratios of an Abdominal Aortic Aneurysm in a Pulsatile Flow  

모정하 (원광대학교 공과대학 기계·시스템디자인공학부)
Publication Information
Journal of Biomedical Engineering Research / v.23, no.3, 2002 , pp. 181-187 More about this Journal
Abstract
The objective of the present study was to two-dimensionally investigate the characteristics of flow and wall shear stress under pulsatile flow in the aneurysm which is a local dilatation of the blood vessel for pulsatile flow. The numerical simulation using the commercial software were carried out for the diameter ratios(ratio of maximum diameter of aneurysm to the diameter of blood vessel) ranging from 1.5 to 2.5 and Womersley number, 15.47. It was shown that a recirculating flow at the bulge was developed and disappeared for one Period and the strength of vortex increased with the diameter ratio Especially. at time of 3.19s. the very weak recirculating flow was developed at the left upper sites of the aneurysm. The maximum values of the wall shear stress increased in Proportion to the diameter ratio. However. the Position of a maximum wall shear stress was the distal end of the aneurysm(z = 35mm) regardless of the diameter ratios.
Keywords
Abdominal Aortic Aneurysm; Wall Shear Stress; Recirculating Flow; Dilatation; Pulsatile Flow; Diameter Ratio;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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