Vortex Tracking Algorithm and Visualization Based on Feature Flow Fields

Abstract

In the search for a new method of feature tracking of vector field, Theisel and Seidel proposed the concept of feature flow field [, In their paper, a flat time-varying flow field and multi-vortex structure, vortex will automatically extract and track based on the concept of feature flow field. The method used for tracking the vortex core flow line integral, by extracting the vortex areas of flow field to determine the vortex core range, precision tracking vortex core in the three-dimensional feature flow field and recording the specific path of evolution in the integrand flow line. The new algorithm using the flow line can describe the dynamic behavior of characteristics of vector field. The evolution of the flow field is more intuitive to observe the evolution of different periods, which laid the basis for visualization.