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| Fast dynamic mesh moving based on background grid morphing |
| Received:August 25, 2010 Revised:February 16, 2011 |
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| DOI：10.7511/jslx20121019 |
| KeyWord:dynamic meshes grid deformation Delaunay graph moving boundary Ball-Vertex method |
| Author | Institution |
| 林天军 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
| 关振群 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
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| Abstract: |
| The dynamic mesh deformation method based on Delaunay graph is non-iterative and therefore efficient.However,inter-sections occur occasionally between the background graph elements for complex geometries with large relative movements,especially for the large boundary rotations.It not only consumes more time but also deteriorates mesh quality to regenerate the graph and to relocate grid points.In this work,a dynamic mesh generation method based on background grid morphing is proposed.By appending some assistant points in the initial graph,a new background graph in conjunction with a new mapping is generated.Then,the Ball-Vertex method is employed to move the new graph which drives the deformation of the object mesh.Some cases demonstrate that the improved method have better ability of keeping the shape for the regions concerned and can improve the intersection problems even with large boundary rotations.In general,the method proposed shows better performance in mesh quality and efficiency. |
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