计算力学学报2019，Vol.36Issue(1)：13-20,8.DOI:10.7511/jslx20171005003
格子玻尔兹曼法多块网格的交界结构优化研究
Optimization study of Multi-Block interface structure based on Lattice Boltzmann Method
摘要
Abstract
An optimal plan of mesh interface between the coarse and fine mesh of Multi-Block method is proposed based on the Lattice Boltzmann Method in this paper.Three key problems in the original mesh interface are effectively solved, namely, the problem of complex programming due to two sets of interpolation operations, memory waste caused by the flow data of the several past time steps is stored for the time interpolation, and accumulative interpolation error due to spatial interpolated interpolation.A new kind of coarse mesh overlapping is developed, in which the interpolation of the original space and time is simplified into a spatial interpolation by means of two-dimensional multi-point spatial interpolation.Classic examples of unsteady flow around a circular cylinder and driven flow of square cavity are analysed.The continuity of mass, momentum and stress at the interface and smoothness of transition of the interface data are verified.The computational results show that the improved Multi-Block algorithm can realize the local mesh refinement, and further promote the application of LBM in practical engineering problems.关键词
格子Boltzmann法/多块网格法/插值方案/圆柱绕流/方腔驱动流/数值模拟Key words
Lattice Boltzmann Method/Multi-Block/interpolation plan/flow around cylinder/driven flow of cavity/numerical simulation分类
数理科学引用本文复制引用
孙丽萍,陆程,王志凯,戴绍仕,付国强..格子玻尔兹曼法多块网格的交界结构优化研究[J].计算力学学报,2019,36(1):13-20,8.基金项目
国家自然科学基金 (11472087) （11472087）
数值水池创新专项一期 (B07019) 资助项目 （B07019）
