Computational Fluid Dynamics Analysis of a Dissected Human Aorta
| Autor: | Hong Ming Wu, 吳鴻銘 |
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| Rok vydání: | 2003 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 91 In this study, we discussed the diseases of aorta induce variety of the wall shear stress and investigated physics behavior of blood flow. We use CFX5 to build computational grids. The MRI outline of dissected aorta was provided by Taiwan University Hospital. In this study, we define dissected place as the part of aorta between cross plane 4 to plane 6 on picture 23. Because dissected aorta model (I) has two branch pipe, we define the pipe that near by inner aorta as inner branch pipe and define the pipe that near by outer aorta as outer branch pipe. The result of this study show that: (1) Dissected aorta with branch pipe model (I) blood flow running into branch pipe that induce velocity of blood fluid lower. Blood was easier pass through master channel than that without branch pipe. This model induce shear stress extend upward. And the joined zone of branch pipe and aorta was easy produce vortex. And there was a pair of reverse secondary flow at downstream of dissected zone when inlet flow decelerated. (2) Dissected aorta with branch pipe model (II) produce similar phenomenon with (1) after we add branch pipe to dissected aorta model (II). We can predict the location of aorta diseases by viewing the fluid physic behavior of this study. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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