Journal article
Robust and Efficient Setup Procedure for Complex Triangulations in Immersed Boundary Simulations
Journal of fluids engineering, Vol.135(10), 101107
10/01/2013
DOI: 10.1115/1.4024804
Abstract
Immersed boundary methods have been widely used for simulating flows with complex geometries, as quality boundary-conforming grids are usually difficult to generate for complex geometries, especially when motion and/or deformation is involved. A major task in immersed boundary simulations is to inject the immersed boundary information into the background Cartesian grid, such as the inside/outside status of a grid point with regard to the immersed boundary and the accurate subcell position of the immersed boundary for a grid point next to it. Complex geometries in immersed boundary methods can be conveniently represented with triangulated surfaces placed upon underlying Cartesian grids in a Lagrangian manner. Regular, intuitive implementations using triangulations can be error-prone and/or cumbersome in dealing with robustness issues. In addition, they can be prohibitively expensive for high resolution simulations with complex moving/deforming boundaries. In this paper, a simple, robust, and fast procedure is developed for setting up complex triangulations in immersed boundary simulations. Central to this setup procedure are a ray casting and closest surface point computation algorithms. Several illustrative examples, including high resolution cases with Cartesian grids of up to 2.1 × 109 points and triangulations of up to 1.3 × 106 surface elements, are performed to demonstrate the robustness and efficiency of our procedure.
Details
- Title: Subtitle
- Robust and Efficient Setup Procedure for Complex Triangulations in Immersed Boundary Simulations
- Creators
- Jianming Yang - e-mail:Frederick Stern - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of fluids engineering, Vol.135(10), 101107
- Publisher
- ASME
- DOI
- 10.1115/1.4024804
- ISSN
- 0098-2202
- eISSN
- 1528-901X
- Language
- English
- Date published
- 10/01/2013
- Academic Unit
- IIHR--Hydroscience and Engineering; Mechanical Engineering
- Record Identifier
- 9984195170402771
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