Detection of small-scale/large-scale interactions in turbulent wall-bounded flows
Detection of small-scale/large-scale interactions in turbulent wall-bounded flows
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DOI：
10.1103/physrevfluids.5.114610
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
E. Mäteling;M. Klaas;W. Schröder
中科院分区：
文献类型：
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作者：
E. Mäteling;M. Klaas;W. Schröder
研究了外层大尺度叠加、振幅调制和畸变对湍流附壁流动近壁动力学的综合影响。介绍了一种新的方法来检测幅度调制，更清楚地揭示了这种现象相比，现有的技术。研究还表明，尺度分离的经验模式分解方法和传统的光谱滤波产生类似的结论的相互作用机制。
A study of the combined effect of outer-layer large-scale superposition, amplitude modulation, and distortions on the near-wall dynamics of turbulent wall-bounded flows is presented. A novel approach to detect the amplitude modulation is introduced that more clearly reveals this phenomenon compared to existing techniques. The study also shows that scale separation by the empirical mode decomposition approach and by conventional spectral filtering yields similar conclusions about the interaction mechanisms.