文档介绍：
刚性浸入边界算法在非等距网格下的研究#
杨青,曹曙阳**
(同济大学土木工程防灾国家重点实验室,上海 200092)
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摘要:在非等距笛卡尔网格下,为探讨适用于刚性边界的浸入边界算法—Virtual Boundary
Method 在传统 CFD 领域中的应用,利用 Fortran 语言开发出此算法的方柱绕流模拟程序。
研究结果表明:非等间距网格下,浸入边界法可以成功地拟合边界;此外对于不同雷诺数下
流场结构和流动参数的分析,体现了雷诺数对流场结构演化的影响;且与同类数值模拟结果
及结论的吻合度较高,证明了算法的可行性和本文程序的准确性。
关键词:非等距笛卡尔网格;刚性边界;浸入边界算法;反馈常系数;边界拟化
中图分类号:O
Research of immersed boundary method for rigid limit
under non-equidistant grid
YANG Qing, CAO Shuyang
(State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai
200092)
Abstract: Under non-equidistant Cartesian grid, Fortran is used to develop puter program for
the simulation of flow over square cylinder to investigate the application of immersed boundary
method which suits to rigid limit in CFD traditional area. The research results indicate that based on the
non-equidistant grid, the virtual boundary can be formed essfully. Furthermore, the detailed study
of fluid field structure and fluid parameters with different reflects the Reynolds number effect on the
flow in this simulation; the es of this simulation have good agreement with other similar
numerical simulations, the feasibility of immersed algorithm and the precision of simulation are
verified..
Key words:
Non-equidistant Cartesian grid, Rigid limit, Immersed Boundary method, Feedback
constant, Boundary formation
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