基于非结构化网格的高可扩展并行有限体积格子 Boltzmann 方法
文献类型：会议论文
| 作者 | 徐磊; 陈荣亮; 蔡小川 |
| 出版日期 | 2018 |
| 会议日期 | 2018 |
| 会议地点 | 507-512 |
| 英文摘要 | Although the lattice Boltzmann method (LBM) has become an effective and promising approach in computational fluid dynamics (CFD), it is still difficult to simulate large-scale flow field with complex geometric boundaries. In this paper, the finite volume lattice Boltzmann method with cell-centered scheme on unstructured grids is given. The convective fluxes are evaluated by low-diffusion Roe scheme, and the gradients of the particle distribution function are computed with Green-Gauss approach. In order to simulate large-scale complex flow field, a parallel algorithm for the finite volume lattice Boltzmann method on unstructured grids is presented. In our method, ParMETIS is applied to partition the unstructured mesh, and then the partitioned meshes are sent to the MPI processes. The parallel performance of two kinds of meshes are compared. Our present scheme is validated by two benchmark flows: (a) the lid-driven flow with Re=400, 1000, 3200 and 5000; (b) the steady viscous flow past a circular cylinder with Re=10, 20, and 40. The results of parallel numerical experiments show that the parallel algorithm still has considerable scalability on 1920 cores, and the efficiency can achieve 78.42% on 1920 cores. |
| 语种 | 中文 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/14134]  |
| 专题 | 深圳先进技术研究院_数字所 |
| 推荐引用方式 GB/T 7714 | 徐磊,陈荣亮,蔡小川. 基于非结构化网格的高可扩展并行有限体积格子 Boltzmann 方法[C]. 见:. 507-512. 2018. |
入库方式： OAI收割
来源：深圳先进技术研究院
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