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Elastic Motion of the Blood Vessel and Wall Shear Stress in Carotid Artery with Stenosis  

Kim Chang Nyung (경희대학교 기계,산업시스템공학부)
Oh Taek Yeol (경희대학교 기계,산업시스템 공학부)
Choi Myung Jin (경희대학교 기계,산업시스템 공학부)
Jung Sam Doo (경희대학교 기계공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.22, no.9, 2005 , pp. 179-187 More about this Journal
Abstract
The characteristics of blood flow and the interaction between the blood vessel and blood flow play important roles in plaque cap rupture and the growth of atherosclerosis which may lead directly to a heart attack or a stroke. In this study, carotid arteries with different stenoses have been numerically simulated to investigate the wall shear stress(WSS) and the elastic motion of the vessel. Blood flow has been treated as physiological, laminar and incompressible flow. To model the shear thining behavior of the blood, the Carreau-Yasuda model has been employed but the viscoelasticity of blood has not been considered. The results show that the WSS of $severe(75\%)$ stenosis is much higher than those of $25\%\;and\;50\%$ stenosis in the region of stenosis. With the increase in the stenosis thickness, the expansion ratio of the center of the stenosis decreases while the expansion ratio of the upstream region of the stenosis increases.
Keywords
Carotid artery; Stenosis; Wall shear stress; Elastic wall; Atherosclerosis; Physiological flow; Non-Newtoian fluid;
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