Simulations of flow and structure interaction using Immersed Boundary Method
| Autor: | Lee, Tzu Jung, 李紫榕 |
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| Rok vydání: | 2016 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 104 In the present study, the problems of solid-fluid interaction using the immersed boundary strategy are investigated. The DKT phenomenon of two sedimenting spheres is presented. The DS phenomenon is observed in the case that the larger sphere is at the bottom. The duration of drafting term in the smallest initial gap in DS phenomenon is investigated at different diameter ratio in the case. On the other hand, in order to simulate the complex-shape object, the method of finding the boundary with the triangular facet surface is added into the numerical method. The triangular facet surface of the object is performed in Standard Tessellation Language (STL) format. In the STL format, the normal vector and three positions of points are recorded in x, y, z-directions. The STL files for the different objects are designed by using CAD. The characteristic of the STL format triangular facet surface is used in the identification of the points around and inside the solid object. The forcing points, decided by using the STL-format triangular facets, is tested in the sphere case and the location of the forcing points are matched with the location found by employing the equation of sphere surface. The parallel computing and altering position of shape are used and validated with the case of rotating ellipsoid. Then, the case of the viscous flow past a sphere is presented. Finally, the case of a rotating turbine with a static fluid domain is performed. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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