An improved local remeshing algorithm for moving boundary problems
| Autor: | Shaolei Li, Yao Zheng, Yufeng Yao, Jianjing Zheng, Jianjun Chen, Zhoufang Xiao |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
boundary recovery
unsteady flow simulation General Computer Science Delaunay triangulation Computer science moving boundary problems Moving boundary problems Unstructured grid generation Grid Computer Science::Numerical Analysis 01 natural sciences 010305 fluids & plasmas 010101 applied mathematics lcsh:TA1-2040 Mesh generation Robustness (computer science) Modeling and Simulation local remeshing technique 0103 physical sciences Recovery procedure 0101 mathematics lcsh:Engineering (General). Civil engineering (General) Hole size Algorithm ComputingMethodologies_COMPUTERGRAPHICS |
| Zdroj: | Engineering Applications of Computational Fluid Mechanics, Vol 10, Iss 1, Pp 403-426 (2016) |
| ISSN: | 1997-003X 1994-2060 |
| DOI: | 10.1080/19942060.2016.1174888 |
| Popis: | Three issues are tackled in this study to improve the robustness of local remeshing techniques. Firstly, the local remeshing region (hereafter referred to as ‘hole’) is initialized by removing low-quality elements and then continuously expanded until a certain element quality is reached after remeshing. The effect of the number of the expansion cycle on the hole size and element quality after remeshing is experimentally analyzed. Secondly, the grid sources for element size control are attached to moving bodies and will move along with their host bodies to ensure reasonable grid resolution inside the hole. Thirdly, the boundary recovery procedure of a Delaunay grid generation approach is enhanced by a new grid topology transformation technique (namely shell transformation) so that the new grid created inside the hole is therefore free of elements of extremely deformed/skewed shape, whilst also respecting the hole boundary. The proposed local remeshing algorithm has been integrated with an in-house unstructured grid-based simulation system for solving moving boundary problems. The robustness and accuracy of the developed local remeshing technique are successfully demonstrated via industry-scale applications for complex flow simulations. |
| Databáze: | OpenAIRE |
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