Metamorphosis of a hairpin vortex into a young turbulent spot
摘要：
Direct numerical simulation was used to study the formation and growth of a hairpin vortex in a flat‐plate boundary layer and its later development into a young turbulent spot. Fluid injection through a slit in the wall triggered the initial vortex. The legs of the vortex were stretched into a hairpin shape as it traveled downstream. Multiple hairpin vortex heads developed between the stretched legs. New vortices formed beneath the streamwise‐elongated vortex legs. The continued development of additional vortices resulted in the formation of a traveling region of highly disturbed flow with an arrowhead shape similar to that of a turbulent spot.
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DOI：
10.1063/1.868363
被引量：
年份：
1994
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