Abstract
A circular jet in a coflowing stream is computed using a supercomputer by axisymmentric discrete vortex method, and results of analysis are visualized by a computer movie system using a personal computer and a magnetic tape device. This system programed with a C-compiler enables fast drawing on CRT, and therefore the evolution of vortex pattern is visualized as a movie without the conventional frame-by-frame recording technique. The formation of large-scale clusters of vortex rings and their amalgamation with neighbouring clusters are clearly observed by color marking on particular vortices in the movie. These motions are very similar to the flow visualization experiments.
