Abstract
Blood flow following Carreau-Yasuda viscosity model at steady-state through various categories of stenotic arterial bifurcations based on Movahed [1] was investigated by using finite element method. Reynolds number was fixed at 233. Results are reported in terms of Wall shear stress (WSS) and velocity distributions. The maximum peaks of WSS were found at the minimum flow area, where high velocities were present. Symmetric stenotic sites give rather symmetric WSS distribution and symmetric velocity profile, whereas on asymmetric sites, the skewness depends upon the presence of the stenotic site as it introduces curvature. Volumetric flow rate ratios at various locations were introduced to indicate the crucial conditions. In addition, levels of stenosis between 30-60 % based on flow area were considered. The 60 % level gave significantly higher WSS peak and the lowest WSS at the location behind the stenosis for the symmetric case. For the asymmetric case, the 50 and 60 % levels show the lowest WSS values at the end of the stenotic site.
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Recommended by Associate Editor Donghyun You
K. Kanokjaruvijit is an Associate Professor in Mechanical Engineering at Naresuan University, Phitsanulok, Thailand. She received her Ph.D. from Imperial College, London. Her research interests include hemodynamics, nanofluid jet impingement and green building technology.
J. Siripokharattana’s research interest in Biomedical engineering involves lung mechanics, hemodynamics, prosthesis and orthosis. After completing an M.S. in Mechanical Engineering from Naresuan University, Mr. Jirasak joined King Mongkut’s University of Technology North Bangkok at Rayong Campus.
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Kanokjaruvijit, K., Donprai-on, T., Phanthura, N. et al. Wall shear stress and velocity distributions in different types of stenotic bifurcations. J Mech Sci Technol 31, 2339–2349 (2017). https://doi.org/10.1007/s12206-017-0430-8
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DOI: https://doi.org/10.1007/s12206-017-0430-8