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DC Field | Value | Language |
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dc.citation.number | 6 | - |
dc.citation.startPage | 065110 | - |
dc.citation.title | PHYSICS OF FLUIDS | - |
dc.citation.volume | 27 | - |
dc.contributor.author | Ahn, Junsun | - |
dc.contributor.author | Lee, Jae Hwa | - |
dc.contributor.author | Lee, Jin | - |
dc.contributor.author | Kang, Ji-hoon | - |
dc.contributor.author | Sung, Hyung Jin | - |
dc.date.accessioned | 2023-12-22T01:11:23Z | - |
dc.date.available | 2023-12-22T01:11:23Z | - |
dc.date.created | 2015-07-08 | - |
dc.date.issued | 2015-06 | - |
dc.description.abstract | A direct numerical simulation of a turbulent pipe flow at a high Reynolds number of Re-tau = 3008 over a long axial domain length (30R) was performed. The stream-wise mean velocity followed the power law in the overlap region (y(+) = 90-300; y/R = 0.03-0.1) based on the power law indicator function. The scale separation of the Reynolds shear stresses into two components of small-and large-scale motions (LSMs) revealed that the LSMs in the outer region played an important role in constructing the constant-stress layer and the mean velocity. In the pre-multiplied energy spectra of the streamwise velocity fluctuations, the bimodal distribution was observed at both short and long wavelengths. The k(x)(-1) region associated with the attached eddies appeared in lambda(x)/R = 2-5 and lambda(x)/y = 18-160 at y(+) = 90-300, where the power law was established in the same region. The k(z)(-1) region also appeared in lambda(z)/R = 0.3-0.6 at y(+) = 3 and 150. Linear growth of small-scale energy to large-scale energy induced the k(x)(-1) region at high Reynolds numbers, resulting in a large population of the LSMs. This result supported the origin of very-large-scale motions in the pseudo-streamwise alignment of the LSMs. In the pre-multiplied energy spectra of the Reynolds shear stress, the bimodal distribution was observed without the k(x)(-1) region. | - |
dc.identifier.bibliographicCitation | PHYSICS OF FLUIDS, v.27, no.6, pp.065110 | - |
dc.identifier.doi | 10.1063/1.4922612 | - |
dc.identifier.issn | 1070-6631 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/16429 | - |
dc.identifier.url | http://scitation.aip.org/content/aip/journal/pof2/27/6/10.1063/1.4922612 | - |
dc.identifier.wosid | 000357688800047 | - |
dc.language | 영어 | - |
dc.publisher | AMER INST PHYSICS | - |
dc.title | Direct numerical simulation of a 30R long turbulent pipe flow at Re=3008 | - |
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 | ARGE-SCALE MOTIONS | - |
dc.subject.keywordPlus | LOGARITHMIC REGION | - |
dc.subject.keywordPlus | BOUNDARY-LAYER | - |
dc.subject.keywordPlus | CHANNEL FLOW | - |
dc.subject.keywordPlus | ORGANIZATION | - |
dc.subject.keywordPlus | FEATURES | - |
dc.subject.keywordPlus | SPECTRA | - |
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