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Article: Numerical simulation of multiplicity and stability of mixed convection in rotating curved ducts

TitleNumerical simulation of multiplicity and stability of mixed convection in rotating curved ducts
Authors
KeywordsMachinery
Issue Date2005
PublisherHindawi Publishing Corp. The Journal's web site is located at http://www.hindawi.com/journals/ijrm/index.html
Citation
International Journal of Rotating Machinery, 2005, v. 2005 n. 2, p. 168-178 How to Cite?
AbstractA numerical study is made on the fully developed bifurcation structure and stability of the mixed convection in rotating curved ducts of square cross-section with the emphasis on the effect of buoyancy force. The rotation can be positive or negative. The fluid can be heated or cooled. The study reveals the rich solution and flow structures and complicated stability features. One symmetric and two symmetric/asymmetric solution branches are found with seventy five limit points and fourteen bifurcation points. The flows on these branches can be symmetric, asymmetric, 2-cell, and up to 14-cell structures. Dynamic responses of the multiple solutions to finite random disturbances are examined by the direct transient computation. It is found that possible physically realizable fully developed flows evolve, as the variation of buoyancy force, from a stable steady multicell state at a large buoyancy force of cooling to the coexistence of three stable steady multicell states, a temporal periodic oscillation state, the coexistence of periodic oscillation and chaotic oscillation, a chaotic temporal oscillation, a subharmonic-bifurcation-driven asymmetric oscillating state, and a stable steady 2-cell state at large buoyancy force of heating.
Persistent Identifierhttp://hdl.handle.net/10722/53394
ISSN
2015 SCImago Journal Rankings: 0.402

 

DC FieldValueLanguage
dc.contributor.authorWang, Len_HK
dc.contributor.authorYang, Ten_HK
dc.date.accessioned2009-04-03T07:18:37Z-
dc.date.available2009-04-03T07:18:37Z-
dc.date.issued2005en_HK
dc.identifier.citationInternational Journal of Rotating Machinery, 2005, v. 2005 n. 2, p. 168-178en_HK
dc.identifier.issn1023-621Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/53394-
dc.description.abstractA numerical study is made on the fully developed bifurcation structure and stability of the mixed convection in rotating curved ducts of square cross-section with the emphasis on the effect of buoyancy force. The rotation can be positive or negative. The fluid can be heated or cooled. The study reveals the rich solution and flow structures and complicated stability features. One symmetric and two symmetric/asymmetric solution branches are found with seventy five limit points and fourteen bifurcation points. The flows on these branches can be symmetric, asymmetric, 2-cell, and up to 14-cell structures. Dynamic responses of the multiple solutions to finite random disturbances are examined by the direct transient computation. It is found that possible physically realizable fully developed flows evolve, as the variation of buoyancy force, from a stable steady multicell state at a large buoyancy force of cooling to the coexistence of three stable steady multicell states, a temporal periodic oscillation state, the coexistence of periodic oscillation and chaotic oscillation, a chaotic temporal oscillation, a subharmonic-bifurcation-driven asymmetric oscillating state, and a stable steady 2-cell state at large buoyancy force of heating.-
dc.languageengen_HK
dc.publisherHindawi Publishing Corp. The Journal's web site is located at http://www.hindawi.com/journals/ijrm/index.htmlen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectMachinery-
dc.titleNumerical simulation of multiplicity and stability of mixed convection in rotating curved ductsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1023-621X&volume=2005&issue=2&spage=168&epage=178&date=2005&atitle=Numerical+simulation+of+multiplicity+and+stability+of+mixed+convection+in+rotating+curved+ductsen_HK
dc.identifier.emailWang, L: lqwang@hkucc.hku.hken_HK
dc.identifier.emailYang, T: tlyang@hkusua.hku.hken_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1155/IJRM.2005.168-
dc.identifier.hkuros105897-

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