Energy stability analysis for impulsively decelerating swirl flows
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Min Chan | - |
dc.contributor.author | Song, Kwang Ho | - |
dc.contributor.author | Choi, Chang Kyun | - |
dc.date.accessioned | 2021-09-09T07:52:45Z | - |
dc.date.available | 2021-09-09T07:52:45Z | - |
dc.date.created | 2021-06-10 | - |
dc.date.issued | 2008-06 | - |
dc.identifier.issn | 1070-6631 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/123459 | - |
dc.description.abstract | The onset of Taylor-Gortler vortices in impulsively decelerating swirl flows is analyzed by using the recently developed, relative stability model. This model takes the growth rate of the kinetic energy of the base state and also that of disturbances into consideration. In the present system the primary transient swirl flow is laminar but for the Reynolds number Re>Re(c) secondary motion sets in at a certain time. The present model yields the critical Reynolds number of Re(c)=153. This value is larger than that from the strong stability model, but smaller than that from the propagation theory. For Re>Re(c) the dimensionless critical time to mark the onset of vortex instabilities, tau(c), is presented as a function of Re. It is found that the predicted tau(c) value is much smaller than experimental detection time of first observable secondary motion. Therefore, it seems evident that small disturbances initiated at tau(c) require some growth period until they are detected experimentally. Since the present system is a rather simple one, the present results will be helpful in comparing available stability models. (C) 2008 American Institute of Physics. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | AMER INST PHYSICS | - |
dc.subject | TAYLOR-GORTLER VORTICES | - |
dc.subject | SPIN-DOWN | - |
dc.subject | BOUNDARY-LAYERS | - |
dc.subject | CONCAVE WALLS | - |
dc.subject | COUETTE-FLOW | - |
dc.subject | REST | - |
dc.subject | TIME | - |
dc.subject | CONVECTION | - |
dc.subject | FLUID | - |
dc.subject | ONSET | - |
dc.title | Energy stability analysis for impulsively decelerating swirl flows | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Song, Kwang Ho | - |
dc.identifier.doi | 10.1063/1.2931690 | - |
dc.identifier.scopusid | 2-s2.0-47149089817 | - |
dc.identifier.wosid | 000257283800021 | - |
dc.identifier.bibliographicCitation | PHYSICS OF FLUIDS, v.20, no.6 | - |
dc.relation.isPartOf | PHYSICS OF FLUIDS | - |
dc.citation.title | PHYSICS OF FLUIDS | - |
dc.citation.volume | 20 | - |
dc.citation.number | 6 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Mechanics | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Mechanics | - |
dc.relation.journalWebOfScienceCategory | Physics, Fluids & Plasmas | - |
dc.subject.keywordPlus | TAYLOR-GORTLER VORTICES | - |
dc.subject.keywordPlus | SPIN-DOWN | - |
dc.subject.keywordPlus | BOUNDARY-LAYERS | - |
dc.subject.keywordPlus | CONCAVE WALLS | - |
dc.subject.keywordPlus | COUETTE-FLOW | - |
dc.subject.keywordPlus | REST | - |
dc.subject.keywordPlus | TIME | - |
dc.subject.keywordPlus | CONVECTION | - |
dc.subject.keywordPlus | FLUID | - |
dc.subject.keywordPlus | ONSET | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
(02841) 서울특별시 성북구 안암로 14502-3290-1114
COPYRIGHT © 2021 Korea University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.