每年出版 4 期
ISSN 打印: 1065-3090
ISSN 在线: 1940-4336
Indexed in
STUDY OF PULSATILE FLOWS IN LATERAL ANEURYSM MODELS ON A STRAIGHT PARENT VESSEL USING PARTICLE TRACKING VELOCIMETRY
摘要
Particle tracking velocimetry (PTV) measurements are presented of transient flow fields in the lateral aneurysm model arising from a straight parent vessel at a 90° angle. The flow considered was pulsatile with a Womersley number of 3.9 and the aneurysm was rigid. The Reynolds number based on the bulk average velocity and diameter of the parent vessel was 600. Four consecutive flow-rate phases were selected to characterize the pulsatile flow fields in the aneurysm sac. It is found that there exist two opposite vortices in the upper half and lower half of the aneurysm sac. The fluids near the dome region, when compared with the main stream in the parent vessel, undergo a phase lag leading to the distribution of wall shear stress along the dome wall at the minimal phase that is larger than that at the other investigated phases. Variations of the velocity distribution, vorticity, and wall shear stress through four consecutive phases are also discussed.
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Liou T.-M., Chang W.-C., Liao C.-C., Experimental Study of Steady and Pulsatile Flows in Cerebral Aneurysm Model of Various Sizes at Branching Site, Journal of Biomechanical Engineering, 119, 3, 1997. Crossref
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Liou T. -M., Liou S. -N., Pulsatile flows in a lateral aneurysm anchored on a stented and curved parent vessel, Experimental Mechanics, 44, 3, 2004. Crossref
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Liou Tong-Miin , Liou Shun-Nan , Chu Kai-Lung , Intra-Aneurysmal Flow With Helix and Mesh Stent Placement Across Side-Wall Aneurysm Pore of a Straight Parent Vessel , Journal of Biomechanical Engineering, 126, 1, 2004. Crossref
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Liou Tong-Miin, Li Yi-Chen, Wang Te-Chuan, Hemodynamics altered by placing helix stents in an aneurysm at a 45° angle to the curved vessel, Physics in Medicine and Biology, 53, 14, 2008. Crossref
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Liou Tong-Miin, Li Yi-Chen, Juan Wei-Cheng, Numerical and experimental studies on pulsatile flow in aneurysms arising laterally from a curved parent vessel at various angles, Journal of Biomechanics, 40, 6, 2007. Crossref
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Liou Tong-Miin, Some applications of experimental and numerical visualization in fluid flow, heat transfer, and combustion, Experimental Thermal and Fluid Science, 25, 6, 2001. Crossref