dc.citation.conferencePlace |
UK |
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dc.citation.conferencePlace |
Southampton |
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dc.citation.title |
11th Turbulence and Shear Flow Phenomena |
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dc.contributor.author |
Kim, Jeong Hyun |
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dc.contributor.author |
Lee, Young Mo |
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dc.contributor.author |
Lee, Jae Hwa |
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dc.date.accessioned |
2024-02-01T00:06:22Z |
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dc.date.available |
2024-02-01T00:06:22Z |
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dc.date.created |
2019-12-19 |
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dc.date.issued |
2019-07-30 |
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dc.description.abstract |
Direct numerical simulations of a fully developed turbulent Couette-Poiseuille flow with a rod-roughened wall is performed to investigate effects of two-dimensional surface roughness elements at Re=7200, based on the centerline laminar velocity and channel half-height (h). The roughness elements are periodically arranged on the bottom wall with a streamwise pitch of λ=8k and the roughness height is k/h=0.12, where k is the roughness height. It is shown that the wall-normal and spanwise stresses and Reynolds shear stress are stronger for the rough wall Couette-Poiseuille flow than the Couette-Poiseuille flow due to the near-wall energy redistribution by the surface roughness. Interestingly, the Reynolds stresses for the rough wall Couette-Poiseuille flow are clearly shown to be decreased in the outer layer. The decrease of the turbulence activity in the channel core for the rough wall Couette-Poiseuille flow is due to the weakening effect of large-scale structures by the surface roughness. |
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dc.identifier.bibliographicCitation |
11th Turbulence and Shear Flow Phenomena |
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dc.identifier.scopusid |
2-s2.0-85073622020 |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/79441 |
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dc.publisher |
Southampton University |
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dc.title |
Effects of surface roughness in a turbulent plane Couette-Poiseuille flow |
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dc.type |
Conference Paper |
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dc.date.conferenceDate |
2019-07-30 |
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