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Evolution of the ring-like vortices and spike structure in transitional boundary layers
Authors:CHEN Lin  TANG DengBin LIU XiaoBing  OLIVEIRA Maria & LIU ChaoQun
Institution:CHEN Lin1,TANG DengBin1 LIU XiaoBing2,OLIVEIRA Maria3 & LIU ChaoQun3 1 Department of Aerodynamics,Nanjing University of Aeronautics , Astronautics,Nanjing 210016,China,2 Wind Engineering Research Center of Hunan University,Changsha 410082,3 Department of Mathematics,University of Texas at Arlington,Arlington,Texas 76010,USA
Abstract:At the late stage of transitional boundary layers, the nonlinear evolution of the ring-like vortices and spike structures and their effects on the surrounding flow were studied by means of direct numerical simulation with high order accuracy. A spatial transition of the flat-plate boundary layers in the compressible flow was conducted. Detailed numerical results with high resolution clearly represented the typical vortex structures, such as ring-like vortices and so on, and induced ejection and sweep events...
Keywords:boundary layer transition  ring-like vortices  spike structure  direct numerical simulation  
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