FLOW STRUCTURE AND VARIATION OF WALL SHEAR STRESS IN ASYMMETRICAL ARTERIAL BRANCH |
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| Institution: | 1. Department of Pharmaceutical Sciences, University of Colorado Denver, Aurora, CO, United States;2. Department of Medicine, National Jewish Health, Denver, CO, United States;1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education of China, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, People''s Republic of China;2. School of Chemical Engineering and Technology, Xi''an Jiaotong University, Xi''an, 710049 Shaanxi, People''s Republic of China;3. School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, People''s Republic of China |
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| Abstract: | In the present study, the flow structure such as the velocity profile and the wall shear stress in an asymmetrical arterial branch in laminar steady flow has been experimentally studied. In the branch model, the daughter tube asymmetrically bifurcates from the parent tube at 45°. The axial and the transverse velocity components have been measured by two-dimensional laser Doppler velocimetry, and the wall shear stress is measured by the electrochemical method. Furthermore, the wall shear stress estimated from the velocity profile is compared with that measured by the electrochemical method. Consequently, it has been clarified that, as it approaches the entrance of the daughter tube, the core flow deflects into the daughter tube, and the variation of wall shear stress along the proximal wall results from the secondary motion which is transferred from the parent tube to the daughter tube. |
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