一种基于CVT的动态流场可视化方法

A Centroidal Voronoi Tessellation Based Visualization Algorithm for Time-Dependent Flow Field

本文给出了一种基于CVT (Centroidal Voronoi Tessellation)的动态流场可视化方法。这种方法基于稳态流场的可视化方法,借助于不同时间层生成元的继承性,缩短了可视化的计算时间;同时,通过引入短流线箭头,不但避免了直线箭头表示向量时相互交叉的问题,而且又更清楚地刻画了流场的特征。数值算例表明了所给出的基于CVT动态流场可视化方法的有效性。

In this work, we present a visualization algorithm based on Centroidal Voronoi tessellation (CVT) for time-dependent flow field datum. The proposed method is based on the CVT-based visualization algorithm for steady flow field datum. The proposed method has good computation cost of obtaining the CVT by inheriting the time layer generator. And by introducing short streamline arrows to represent flow field datum, this method can avoid the reciprocal chiasma of straight arrow as well as can capture the features of flow field datum. Numerical examples demonstrate e?ectiveness and robustness of the centroidal Voronoi tessellation based visualization algorithm for typical flow field datum with eddies.