Structural organization of the quiescent core region in a turbulent channel flow

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• 作者：Jongmin Yang ; Jinyul Hwang ; Hyung Jin Sung ; ^{hjsung@kaist.ac.kr}
• 关键词：Large-scale motions ; Quiescent core region ; Turbulent/non-turbulent interface ; Vortex population
• 刊名：International Journal of Heat and Fluid Flow
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：62
• 期：part_PB
• 页码：455-463
• 全文大小：2309 K
• 卷排序：62

文摘

The structural organization of the quiescent core region in a turbulent channel flow is explored. The quiescent core region is the uniform momentum zone located at the center of the channel. The boundary of the quiescent core region can be identified from the probability density function of the streamwise modal velocity. The prograde and retrograde vortices form a counter-rotating vortex pair at the boundary of the core region.