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Title: Visualizations of vortex filaments
Description:
Visualizations of stretched vortices are presented which model concentrated vorticity filaments in turbulent flows. These are known to play an important role in the intermittency. Because of the difficulties associated with working on filaments in real turbulence, we isolate such a structure from its turbulent background. A vortex filament is created by stretching (through suction) the vorticity of a laminar boundary layer flow. This coherent structure is visualized and characterized as a function of the initial vorticity and of the stretching. Credits: F. Bottausci and P. Petitjeans References: Web Page: http://pof.aip.org/pof/gallery/video/2002/914209phf_lg.mov Contributed By: Tausif Billah |