Numerical simulation of quasi-streamwise hairpin-like vortex generation in turbu

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Numerical simulation of quasi-streamwise hairpin-like vortex generation in turbulent boundary layer

A mechanism for generation of near wall quasi-streamwise hairpin-like vortex (QHV) and secondary quasi-streamwise vortices (SQV) is presented. The conceptual model of resonant triad in the theory of hydrodynamic instability and direct numerical simulation of a turbulent boundary layer were applied to reveal the formation of QHV and SQV. The generation procedures and the characteristics of the vortex structures are obtained, which share some similarities with previous numerical simulations. The research using resonant triad conceptual model and numerical simulation provides a possibility for investigating and controling the vortex structures, which play a dominant role in the evolution of coherent structures in the near-wall region.水利论文ME]LPx p,n

作 者: ZHANG Nan LU Li-peng DUAN Zhen-zhen YUAN Xiang-jiang  
作者单位:ZHANG Nan,LU Li-peng,DUAN Zhen-zhen(School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, P. R. China)
t8T]!p$ct(z8vh0YUAN Xiang-jiang(National CFD Laboratory, Beijing University of Aeronautics and Astronautics, Beijing 100083, P. R. China) 
刊 名:应用数学和力学(英文版)  EI SCI
英文刊名:APPLIED MATHEMATICS AND MECHANICS 
年,卷(期):2008 29(1) 
分类号:O357.5 
关键词:turbulence   boundary layer   coherent structure   computer simulation   streamwise vortex  
机标关键词:direct numerical simulationvortex structuresconceptual modelturbulent boundary layerhydrodynamic instabilitynumerical simulationscoherent structures 
基金项目:国家自然科学基金 
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