DC Field | Value | Language |
---|---|---|
dc.contributor.author | Wang, Li-Hao | ko |
dc.contributor.author | Xu, Chun-Xiao | ko |
dc.contributor.author | Sung, Hyung Jin | ko |
dc.contributor.author | Huang, Wei-Xi | ko |
dc.date.accessioned | 2021-06-01T02:10:34Z | - |
dc.date.available | 2021-06-01T02:10:34Z | - |
dc.date.created | 2021-06-01 | - |
dc.date.created | 2021-06-01 | - |
dc.date.issued | 2021-03 | - |
dc.identifier.citation | PHYSICAL REVIEW FLUIDS, v.6, no.3 | - |
dc.identifier.issn | 2469-990X | - |
dc.identifier.uri | http://hdl.handle.net/10203/285393 | - |
dc.description.abstract | The wall-attached structures of velocity fluctuations over a traveling wavy boundary are explored here by performing large eddy simulation (LES) at a moderate Reynolds number (Re-tau approximate to 1000). The wave slope is ak = 0.1, where a is the wave amplitude and k is the wave number. The prescribed wave age is c/u(*) = 2, where c is the wave phase speed and u(*) is the friction velocity. For comparison, the results of a LES over a smooth wall are also discussed. The wall-attached structures are self-similar with respect to their heights, and in particular the population density of their streamwise components scales inversely with their heights, which is reminiscent of a hierarchy of attached eddies. The wall-attached structures in the flow over the traveling wavy boundary retain geometric self-similarity; however, their streamwise length scale is decreased by the wavy boundary while their spanwise length scale is increased. By conditionally averaging the streamwise velocity fluctuations within the wall-attached structures, the reconstructed streamwise turbulent intensity was found to exhibit logarithmic behavior. The turbulent intensity carried by the small-scale wall-attached structures in the near-wall region is weakened by the traveling wavy boundary, while that of the large-scale wall-attached structures in the outer region is enhanced. The streamwise velocity corresponding to the highest uniform momentum zone for the large-scale wall-attached structures in the presence of the wavy boundary is larger than that for the smooth wall. | - |
dc.language | English | - |
dc.publisher | AMER PHYSICAL SOC | - |
dc.title | Wall-attached structures over a traveling wavy boundary: Turbulent velocity fluctuations | - |
dc.type | Article | - |
dc.identifier.wosid | 000652841200001 | - |
dc.identifier.scopusid | 2-s2.0-85103446338 | - |
dc.type.rims | ART | - |
dc.citation.volume | 6 | - |
dc.citation.issue | 3 | - |
dc.citation.publicationname | PHYSICAL REVIEW FLUIDS | - |
dc.identifier.doi | 10.1103/PhysRevFluids.6.034611 | - |
dc.contributor.localauthor | Sung, Hyung Jin | - |
dc.contributor.nonIdAuthor | Wang, Li-Hao | - |
dc.contributor.nonIdAuthor | Xu, Chun-Xiao | - |
dc.contributor.nonIdAuthor | Huang, Wei-Xi | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | DIRECT NUMERICAL-SIMULATION | - |
dc.subject.keywordPlus | COHERENT STRUCTURES | - |
dc.subject.keywordPlus | QUIESCENT CORE | - |
dc.subject.keywordPlus | CHANNEL | - |
dc.subject.keywordPlus | FLOW | - |
dc.subject.keywordPlus | REGION | - |
dc.subject.keywordPlus | EDDIES | - |
dc.subject.keywordPlus | MODEL | - |
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