Comparisons between low Reynolds number two-equation models for computation of a shockwave-turbulent-boundary layer interaction

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dc.contributor.authorYoon, BKko
dc.contributor.authorChung, Myung Kyoonko
dc.contributor.authorPark, Seung Oko
dc.date.accessioned2013-03-03T00:59:45Z-
dc.date.available2013-03-03T00:59:45Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued1997-08-
dc.identifier.citationAERONAUTICAL JOURNAL, v.101, no.1007, pp.335 - 345-
dc.identifier.issn0001-9240-
dc.identifier.urihttp://hdl.handle.net/10203/76370-
dc.description.abstractA comparative study is made on the performance of several low Reynolds number k-epsilon models and the k-omega model in predicting the shockwave-turbulent-boundary layer interaction over a supersonic compression ramp of 16 degrees, 20 degrees and 24 degrees at a Mach numbers of 2.85, 2.79 and 2.84, respectively. The model equations are numerically solved by a higher order upwind scheme with the 3rd order MUSCL type TVD. The computational results reveal that all of the low Reynolds number k-epsilon models, particularly those employing y+ in their damping functions give erroneously large skin friction in the redeveloping region. It is also interesting to note that the k-epsilon models, when adjusted and based on DNS data, do not perform better, as expected, than the conventional low Reynolds number k-epsilon models. The k-omega model which does not adopt a low Reynolds number modification, brings about reasonably accurate skin friction, but with a later onset of pressure rise. By recasting the omega equation into the general form of the epsilon equation, it is inferred that the turbulent cross diffusion term between k and epsilon is critical to guarantee better performance of the k-omega model for the skin friction prediction in the redeveloping region. Finally, an asymptotic analysis of a fully developed incompressible channel flow, with the k-epsilon and the k-omega models, reveals that the cross diffusion mechanism inherent in the k-omega model contributes to the better performance of the k-omega model.-
dc.languageEnglish-
dc.publisherROYAL AERONAUTICAL SOC-
dc.titleComparisons between low Reynolds number two-equation models for computation of a shockwave-turbulent-boundary layer interaction-
dc.typeArticle-
dc.identifier.wosidA1997YD76100007-
dc.identifier.scopusid2-s2.0-0031197708-
dc.type.rimsART-
dc.citation.volume101-
dc.citation.issue1007-
dc.citation.beginningpage335-
dc.citation.endingpage345-
dc.citation.publicationnameAERONAUTICAL JOURNAL-
dc.contributor.localauthorChung, Myung Kyoon-
dc.contributor.localauthorPark, Seung O-
dc.contributor.nonIdAuthorYoon, BK-
dc.type.journalArticleArticle-
dc.subject.keywordPlusK-EPSILON MODEL-
dc.subject.keywordPlusNEAR-WALL TURBULENCE-
dc.subject.keywordPlusFLOWS-
dc.subject.keywordPlusWAVE-
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