An Efficient Dynamic Mesh Generation Method for Complex Multi-Block Structured Grid

An Efficient Dynamic Mesh Generation Method for Complex Multi-Block Structured Grid
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复杂多块结构化网格的高效动态网格生成方法

DOI:
10.4208/aamm.2013.m199
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发表时间:
2014-02
影响因子:
1.4
通讯作者:
Guo Tongqing
Guo Tongqing
中科院分区:
工程技术3区
文献类型:
--
作者:
Ding Li;Lu Zhiliang;Guo Tongqing

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针对复杂的多块结构网格,提出了一种基于径向基函数(rbf)和超限插值(TFI)的动态网格生成方法。当物体移动时,多块结构网格会发生变化。网格快速变形是数值模拟的关键。在这项工作中,动态网格变形分两步完成。首先,我们选择所有已知变形的块顶点作为中心点,并应用rbf插值得到块边缘的网格变形。然后,采用基于弧长的TFI算法,有效地计算出块表面和块内部的网格变形;本方法可以很好地应用于二维(2D)和三维(3D)问题。数值结果表明,该方法能够准确、高效地生成所有测试用例的动态网格。
Aiming at a complex multi-block structured grid, an efficient dynamic mesh generation method is presented in this paper, which is based on radial basis functions (RBFs) and transfinite interpolation (TFI). When the object is moving, the multi-block structured grid would be changed. The fast mesh deformation is critical for numerical simulation. In this work, the dynamic mesh deformation is completed in two steps. At first, we select all block vertexes with known deformation as center points, and apply RBFs interpolation to get the grid deformation on block edges. Then, an arc-length-based TFI is employed to efficiently calculate the grid deformation on block faces and inside each block. The present approach can be well applied to both two-dimensional (2D) and three-dimensional (3D) problems. Numerical results show that the dynamic meshes for all test cases can be generated in an accurate and efficient manner.
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