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DC Field | Value | Language |
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dc.citation.number | 1 | - |
dc.citation.startPage | 015104 | - |
dc.citation.title | PHYSICS OF FLUIDS | - |
dc.citation.volume | 28 | - |
dc.contributor.author | Lee, Jae Hwa | - |
dc.contributor.author | Lee, Jin | - |
dc.contributor.author | Kim, Jung Hoon | - |
dc.date.accessioned | 2023-12-22T00:14:17Z | - |
dc.date.available | 2023-12-22T00:14:17Z | - |
dc.date.created | 2016-01-20 | - |
dc.date.issued | 2016-01 | - |
dc.description.abstract | Direct numerical simulation of a turbulent boundary layer over a rod-roughened wall is performed with a long streamwise domain to examine the streamwise-scale growth mechanism of streamwise velocity fluctuating structures in the presence of two-dimensional (2-D) surface roughness. An instantaneous analysis shows that there is a slightly larger population of long structures with a small helix angle (spanwise inclinations relative to streamwise) and a large spanwise width over the rough-wall compared to that over a smooth-wall. Further inspection of time-evolving instantaneous fields clearly exhibits that adjacent long structures combine to form a longer structure through a spanwise merging process over the rough-wall; moreover, spanwise merging for streamwise scale growth is expected to occur frequently over the rough-wall due to the large spanwise scales generated by the 2-D roughness. Finally, we examine the influence of a large width and a small helix angle of the structures over the rough-wall with regard to spatial two-point correlation. The results show that these factors can increase the streamwise coherence of the structures in a statistical sense. | - |
dc.identifier.bibliographicCitation | PHYSICS OF FLUIDS, v.28, no.1, pp.015104 | - |
dc.identifier.doi | 10.1063/1.4939714 | - |
dc.identifier.issn | 1070-6631 | - |
dc.identifier.scopusid | 2-s2.0-84954213900 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/18275 | - |
dc.identifier.url | http://scitation.aip.org/content/aip/journal/pof2/28/1/10.1063/1.4939714 | - |
dc.identifier.wosid | 000374595500042 | - |
dc.language | 영어 | - |
dc.publisher | AMER INST PHYSICS | - |
dc.title | Scale growth of structures in the turbulent boundary layer with a rod-roughened wall | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Mechanics; Physics, Fluids & Plasmas | - |
dc.relation.journalResearchArea | Mechanics; Physics | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | DIRECT NUMERICAL-SIMULATION | - |
dc.subject.keywordPlus | PIPE-FLOW | - |
dc.subject.keywordPlus | ORGANIZATION | - |
dc.subject.keywordPlus | SMOOTH | - |
dc.subject.keywordPlus | MOTIONS | - |
dc.subject.keywordPlus | REGION | - |
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