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Statistics and dynamics of coherent structures in compressible wall-bounded turbulence
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Statistics and dynamics of coherent structures in compressible wall-bounded turbulence
Compressible wall-bounded turbulence is ubiquitously encountered in modem aerospace and mechanical industries.In this review,we summarize the current state of the literature on the flow physics of compressible wall-bounded turbulence with simple flow geometry and boundary constraints,focusing on the statistics and dynamics of coherent structures,the seemingly organized flow patterns hidden amidst the nonlinear chaotic random processes.We summarize the conclusions brought by recent year studies regarding the influences of the Mach number and wall temperature on the velocity streaks,quasi-stream wise vortices and dilatational motions in the near-wall region,and the large-scale and very-large-scale motions in the outer region,from both statistical and dynamical point of view,with the primary concern of the similarities with and disparities from those in in-compressible flows.
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