SPH方法Delaunay三角刨分与自由液面重构

doi:10.7511/jslx201604027

CORC > 北京大学 > 工学院

	SPH方法Delaunay三角刨分与自由液面重构; Delaunay triangulation and free surface extraction for SPH method
	杨秀峰 ; 刘谋斌
刊名	计算力学学报
	2016
关键词	SPH smoothed particle hydrodynamics (SPH ) Delaunay triangulation free surface extraction post-processing Delaunay三角刨分自由表面后处理
DOI	10.7511/jslx201604027
英文摘要	光滑粒子法(SPH)作为一种拉格朗日型无网格方法,兼具欧拉网格方法和拉格朗日网格方法的优势,已经成功应用于科学和工程的众多领域。SP H 方法后处理一般基于无规则分布的粒子,不如网格类方法后处理简便、直接。另外,SP H 方法模拟自由液面流动等问题时,通过粒子位置难以重构自由液面的准确位置。发展一种基于Delaunay三角刨分的 SPH 后处理方法,即先基于 SPH 粒子位置利用 Delaunay 三角刨分建立三角网格,然后将粒子信息转化成网格单元/节点信息,从而可以在三角网格上进行后处理,实现基于网格方法的后处理功能,并可以在三角网格上直接提取或重构自由液面。将本文的方法应用到液滴碰撞和溃坝流 SP H 模拟结果的后处理中,得到了非常好的结果,表明本文的方法有效可靠。; Smoothed particle hydrodynamics (SPH )is a meshfree,Lagrangian particle method,which combines the best features of Eulerian and Lagrangian grid-based methods,and has been successfully applied to different areas in sciences and engineering.The post-processing of SPH is not as straight forward and convenient as the grid-based methods since the information is based on irregularly distribu-ted particles rather than on a grid system.Moreover,free surfaces are usually difficult to be reconstruc-ted or extracted based simply on SPH particles.In this paper,a Delaunay triangulation is developed,in which a triangular mesh is generated form SPH particles through Delaunay triangulation,and the related information on SPH particles is converted to the triangular mesh.The SPH post-processing can then be conducted on the triangular mesh rather than on the SPH particles.Also free surfaces can be extracted from the generated Delaunay mesh.Two typical examples,the head-on collision of two liquid drops and dam collapse have been simulated.The obtained results with precisely extracted free surfaces demon-strate the effectiveness of the approach of Delaunay triangulation and free surface extraction for SPH method.; 国家自然科学基金; 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 4; 594-598; 33
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/494148]
专题	工学院
推荐引用方式 GB/T 7714	杨秀峰,刘谋斌. SPH方法Delaunay三角刨分与自由液面重构, Delaunay triangulation and free surface extraction for SPH method[J]. 计算力学学报,2016.
APA	杨秀峰,&刘谋斌.(2016).SPH方法Delaunay三角刨分与自由液面重构.计算力学学报.
MLA	杨秀峰,et al."SPH方法Delaunay三角刨分与自由液面重构".计算力学学报 (2016).