File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: The onset of electrothermoconvection in a rotating Brinkman porous layer

TitleThe onset of electrothermoconvection in a rotating Brinkman porous layer
Authors
KeywordsBrinkman porous medium
Electro-thermo-convection
Electrohydrodynamic instability
Issue Date2011
PublisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/ijengsci
Citation
International Journal Of Engineering Science, 2011, v. 49 n. 7, p. 646-663 How to Cite?
AbstractThe criterion for the onset of electrothermoconvection in a rotating horizontal layer of Brinkman porous medium is investigated for different types of velocity boundary conditions namely, (i) both boundaries stress-free, (ii) both boundaries rigid and (iii) lower rigid and upper free boundaries. Results indicate that the nature of boundaries and speed of rotation significantly influence the stability characteristics of the system. In the case of stress-free condition, it is shown that the necessary conditions for the occurrence of oscillatory onset are independent of an external electric field. Contrary to their stabilizing effect in the absence of rotation, increasing the ratio of viscosities Λ and decreasing the Darcy number Da show some destabilizing effect on the onset of stationary electrothermoconvection in the presence of rotation and some important observations are made on the stability characteristics of the system. Moreover, the similarities and differences between free-free, rigid-rigid and rigid-free boundaries are emphasized in triggering the onset of electrothermoconvection in a rotating porous layer. For small Taylor number domain, the stress-free boundaries is found to be always unstable than that of rigid-rigid and rigid-free boundaries. However, this trend is reversed at higher Taylor number domain because the stability of the stress-free case is increased more quickly than the other boundaries. © 2011 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/133631
ISSN
2015 Impact Factor: 3.165
2015 SCImago Journal Rankings: 1.916
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of the Hong Kong Special Administrative Region, ChinaHKU 75609E
HKU 715510E
Funding Information:

One of the authors (ISS) wishes to thank The University of Hong Kong for inviting him as a visiting Professor and also the Bangalore University for sanctioning sabbatical leave. The work was supported by the Research Grants Council of the Hong Kong Special Administrative Region, China, through Project Nos. HKU 75609E and HKU 715510E.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorShivakumara, ISen_HK
dc.contributor.authorNg, COen_HK
dc.contributor.authorNagashree, MSen_HK
dc.date.accessioned2011-05-24T02:12:29Z-
dc.date.available2011-05-24T02:12:29Z-
dc.date.issued2011en_HK
dc.identifier.citationInternational Journal Of Engineering Science, 2011, v. 49 n. 7, p. 646-663en_HK
dc.identifier.issn0020-7225en_HK
dc.identifier.urihttp://hdl.handle.net/10722/133631-
dc.description.abstractThe criterion for the onset of electrothermoconvection in a rotating horizontal layer of Brinkman porous medium is investigated for different types of velocity boundary conditions namely, (i) both boundaries stress-free, (ii) both boundaries rigid and (iii) lower rigid and upper free boundaries. Results indicate that the nature of boundaries and speed of rotation significantly influence the stability characteristics of the system. In the case of stress-free condition, it is shown that the necessary conditions for the occurrence of oscillatory onset are independent of an external electric field. Contrary to their stabilizing effect in the absence of rotation, increasing the ratio of viscosities Λ and decreasing the Darcy number Da show some destabilizing effect on the onset of stationary electrothermoconvection in the presence of rotation and some important observations are made on the stability characteristics of the system. Moreover, the similarities and differences between free-free, rigid-rigid and rigid-free boundaries are emphasized in triggering the onset of electrothermoconvection in a rotating porous layer. For small Taylor number domain, the stress-free boundaries is found to be always unstable than that of rigid-rigid and rigid-free boundaries. However, this trend is reversed at higher Taylor number domain because the stability of the stress-free case is increased more quickly than the other boundaries. © 2011 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_US
dc.publisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/ijengscien_HK
dc.relation.ispartofInternational Journal of Engineering Scienceen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Engineering Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Engineering Science, 2011, v. 49 n. 7, p. 646–663. DOI: 10.1016/j.ijengsci.2011.02.010-
dc.subjectBrinkman porous mediumen_HK
dc.subjectElectro-thermo-convectionen_HK
dc.subjectElectrohydrodynamic instabilityen_HK
dc.titleThe onset of electrothermoconvection in a rotating Brinkman porous layeren_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0020-7225&volume=49&issue=7&spage=646–663&epage=&date=2011&atitle=The+onset+of+electrothermoconvection+in+a+rotating+Brinkman+porous+layeren_US
dc.identifier.emailNg, CO:cong@hku.hken_HK
dc.identifier.authorityNg, CO=rp00224en_HK
dc.description.naturepostprint-
dc.identifier.doi10.1016/j.ijengsci.2011.02.010en_HK
dc.identifier.scopuseid_2-s2.0-79955606940en_HK
dc.identifier.hkuros185285en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79955606940&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume49en_HK
dc.identifier.issue7en_HK
dc.identifier.spage646en_HK
dc.identifier.epage663en_HK
dc.identifier.isiWOS:000291137000009-
dc.publisher.placeUnited Statesen_HK
dc.relation.projectElectrohydrodynamic slip flow through a channel with micropatterned surfaces-
dc.identifier.scopusauthoridShivakumara, IS=6603560855en_HK
dc.identifier.scopusauthoridNg, CO=7401705594en_HK
dc.identifier.scopusauthoridNagashree, MS=21834431500en_HK
dc.identifier.citeulike9185781-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats