DC Field | Value | Language |
---|---|---|
dc.contributor.author | Shi, Liu Liu | ko |
dc.contributor.author | Liu, Ying Zheng | ko |
dc.contributor.author | Sung, Hyung Jin | ko |
dc.date.accessioned | 2013-03-09T12:43:26Z | - |
dc.date.available | 2013-03-09T12:43:26Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2010-10 | - |
dc.identifier.citation | JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS, v.98, pp.492 - 503 | - |
dc.identifier.issn | 0167-6105 | - |
dc.identifier.uri | http://hdl.handle.net/10203/96381 | - |
dc.description.abstract | A comparative study of the wake characteristics behind a two-dimensional square cylinder in proximity to a plane wall was made on two systems, i.e. G/D=0.25 and 0.5, which corresponds to the wakes with and without suppression of the vortex shedding, respectively. Here, G is the gap distance and D is the width of the square cylinder. Synchronized measurements of wall-pressure fluctuations and velocity fluctuations were made using a microphone array and a split-fiber film, respectively. For the system G/D=0.5, a regular Karman-like vortex shedding at fD/U(0)=0.13 was found by inspection of the streamwise velocity spectra. When the gap width is reduced to G/D=0.25, a low-speed separation bubble was formed in the region 4.25 < x/D <9.25, while the intermittent existence of large-scale vortices at the reduced frequency fD/U(0)=0.116 was identified in the upper shear layer. The convective vortex dynamics were analyzed in terms of the cross-correlation of the wall-pressure fluctuation, coherence and cross-correlation of wall-pressure fluctuations with velocity fluctuations at various positions located at the lower edge of the cylinder (y/D=G/D) and the outer edge of the upper shear layer. The convection velocities of the Karman-like vortices in the system G/D=0.5 was determined to be U(c)/U(0)=0.64. However, in the system G/D=0.25 the convection velocities before and behind x/D=3.25 were determined to be U(c)/U(0)=0.32 and 0.64, respectively. (C) 2010 Elsevier Ltd. All rights reserved. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.subject | CIRCULAR-CYLINDER | - |
dc.subject | BOUNDARY-LAYER | - |
dc.subject | FLOW | - |
dc.subject | TURBULENT | - |
dc.subject | VELOCITY | - |
dc.subject | FORCES | - |
dc.title | On the wake with and without vortex shedding suppression behind a two-dimensional square cylinder in proximity to a plane wall | - |
dc.type | Article | - |
dc.identifier.wosid | 000280928300002 | - |
dc.identifier.scopusid | 2-s2.0-77954954621 | - |
dc.type.rims | ART | - |
dc.citation.volume | 98 | - |
dc.citation.beginningpage | 492 | - |
dc.citation.endingpage | 503 | - |
dc.citation.publicationname | JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS | - |
dc.identifier.doi | 10.1016/j.jweia.2010.03.002 | - |
dc.contributor.localauthor | Sung, Hyung Jin | - |
dc.contributor.nonIdAuthor | Shi, Liu Liu | - |
dc.contributor.nonIdAuthor | Liu, Ying Zheng | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Wake | - |
dc.subject.keywordAuthor | Wall-pressure fluctuations | - |
dc.subject.keywordAuthor | Vortex shedding | - |
dc.subject.keywordAuthor | Wall proximity | - |
dc.subject.keywordPlus | CIRCULAR-CYLINDER | - |
dc.subject.keywordPlus | BOUNDARY-LAYER | - |
dc.subject.keywordPlus | FLOW | - |
dc.subject.keywordPlus | TURBULENT | - |
dc.subject.keywordPlus | VELOCITY | - |
dc.subject.keywordPlus | FORCES | - |
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