基于PVM的三维矢量场流面构造  

Parallel Computing of Stream Surface on PVM for 3D CFD Vector Field

作　　者：任碧宁[1] 魏生民[2] 罗卫平[2] 

机构地区：[1]中国航空计算技术研究所,西安710068 [2]西北工业大学CAD/CAM研究中心

出　　处：《计算机工程与应用》1999年第12期39-41,共3页Computer Engineering and Applications

摘　　要：文章提出一种三维矢量场自适应粒子跟踪快速算法和基于ＰＶＭ的流面并行计算策略。该算法采用改进的单元搜索方法，消除了原算法计算精度不高和流动特征容易丢失的缺陷。其自适应步长技术，在保证计算精度的前提下，大大减少了流线上的点数，提高了流面的生成速度。实践证明，这种基于ＰＶＭ的并行计算策略进一步加快了算法速度。A fast algorithm for stream surface for 3D CFD vector field based on particle tracing method is described in this article with cell searching method using tetrahedral decomposition. An adaptive step is used withthe step decreased if the velocity direction changes too much betWeen successive steps, and increased if it changessufficiently little. This greatly reduces the number of points on stream lines without loss of calculating precision. Asimplified triangulation method is use to obtain the stream surface from a set of stream lines. The fast algorithm isimplemented on PVM(Parallel Virtual Machine) to construct its stream surface, which further reduces the calculatingtime.

关 键 词：PVM 矢量场 流面 消隐处理 可视化 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]