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| Improved AFT and background-mesh methods for two-dimensional adaptive mesh generation |
| Revised:December 02, 2003 |
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| DOI：10.7511/jslx20056135 |
| KeyWord:adaptive mesh regeneration,advancing front technique,background method |
| SONG Chao GUAN Zhen-qun~* GU Yuan-xian |
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| Abstract: |
| This paper applies Advancing Front Technique(AFT) and background method in adaptive finite element mesh generation based on re-meshing.High-quality mesh generation technique and the element size computation method are two key issues to adaptive mesh generation.This paper proposed improved advancing front technique and background method to address these two issues.In improved advancing front technique,front segments are divided into active fronts and inactive fronts.When a front segment is to be selected to generate a new triangle,both its size and category are considered simultaneously.In improved background method,background elements are managed by structured grid,and triangle elements are mapped into the grid.Therefore,the element size can be computed efficiently and the transition of new elements size is guaranteed.Two examples about adaptive mesh generation are provided to illustrate the efficiency and robustness of the proposed approach. |
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