Analysis of pulsatile flow in arteriovenous fistula through numerical simulation
This work aim to analyze the hemodynamic factors in the flow within an Arteriovenous Fistula (AVF) using a flow field calculated by numerical simulation as a visualization technique. The geometrical model is virtually reconstructed from a computed tomography scan. The considerations made are of Newt...
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| Principais autores: | , , , , , |
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| Formato: | bachelorThesis |
| Idioma: | en_US |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/43066 |
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| Resumo: | This work aim to analyze the hemodynamic factors in the flow within an Arteriovenous Fistula (AVF) using a flow field calculated by numerical simulation as a visualization technique. The geometrical model is virtually reconstructed from a computed tomography scan. The considerations made are of Newtonian fluid, laminar and incompressible flow and pulsatile flow. Primary and secondary flows are observed in the velocity field along the AVF. In the artery, the velocity profile is typical of a laminar flow. In the anastomosis and distal regions, axial and radial recirculations are observed. The maximum velocity calculated along the AVF is 1.38 m/s. The maximum wall shear stress is of 49 Pa and shows no uniformity, varying according to velocity. The presence of recirculations allows blood formed elements to collide excessively against the endothelial wall. At regions with wall shear stress above 35 Pa, the endothelial cells can suffer damage and myointimal hyperplasia may form. |
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