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Article: Impinging round jet studies in a cylindrical enclosure with and without a porous layer: Part I - Flow visualisations and simulations

TitleImpinging round jet studies in a cylindrical enclosure with and without a porous layer: Part I - Flow visualisations and simulations
Authors
KeywordsCfd Simulations
Flow Visualisations
Modelling
Porous Media
Turbulence
Issue Date2001
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ces
Citation
Chemical Engineering Science, 2001, v. 56 n. 12, p. 3855-3878 How to Cite?
AbstractThe interaction of turbulently flowing fluids and porous media occurs in many problems of practical interest. However, the engineering science literature appears to be devoid of either experimental or theoretical studies of such systems. In this paper, extensive flow visualisation experiments and comparisons with computational fluid dynamics (CFD) simulations are reported for these systems. In such systems, the turbulence in the adjacent fluid region can persist in the porous medium depending on its permeability and porosity. In the present study, turbulence is generated by using a round water jet that impinges on a porous foam. Due to the opaque nature of the porous medium, visualisations are carried out only in the fluid layer. However, the flow field in the fluid layer is affected by the flow in the porous medium, especially when the porous foam has a high permeability. Visualisations have been carried out to qualitatively evaluate the effect of the permeability of the porous medium, the height of the fluid layer and the thickness of the porous medium. A mathematical model of the system is formulated which incorporates two different turbulence models and a laminar model for the porous medium. A low-Reynolds number k-e turbulence model is used for the fluid layer in all cases. The resulting CFD predictions reflect well the effects of the changes in the permeability of the porous medium as well as the height of the fluid layer. However, the predictions are not as reliable in showing the changes due to the thickness of the porous medium. Predictions with one of the turbulence models with only Darcy damping in the turbulence transport equations for the porous medium is shown to give better qualitative comparisons for the gross flow patterns. Part II of this paper presents laser Doppler velocimetry measurements for the same system and comparisons of these measurements with the CFD simulations for a quantitative evaluation of the mathematical model. © 2001 Published by Elsevier Science Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/156620
ISSN
2015 Impact Factor: 2.75
2015 SCImago Journal Rankings: 1.073
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorPrakash, Men_US
dc.contributor.authorTuran, ÖFen_US
dc.contributor.authorLi, Yen_US
dc.contributor.authorMahoney, Jen_US
dc.contributor.authorThorpe, GRen_US
dc.date.accessioned2012-08-08T08:43:14Z-
dc.date.available2012-08-08T08:43:14Z-
dc.date.issued2001en_US
dc.identifier.citationChemical Engineering Science, 2001, v. 56 n. 12, p. 3855-3878en_US
dc.identifier.issn0009-2509en_US
dc.identifier.urihttp://hdl.handle.net/10722/156620-
dc.description.abstractThe interaction of turbulently flowing fluids and porous media occurs in many problems of practical interest. However, the engineering science literature appears to be devoid of either experimental or theoretical studies of such systems. In this paper, extensive flow visualisation experiments and comparisons with computational fluid dynamics (CFD) simulations are reported for these systems. In such systems, the turbulence in the adjacent fluid region can persist in the porous medium depending on its permeability and porosity. In the present study, turbulence is generated by using a round water jet that impinges on a porous foam. Due to the opaque nature of the porous medium, visualisations are carried out only in the fluid layer. However, the flow field in the fluid layer is affected by the flow in the porous medium, especially when the porous foam has a high permeability. Visualisations have been carried out to qualitatively evaluate the effect of the permeability of the porous medium, the height of the fluid layer and the thickness of the porous medium. A mathematical model of the system is formulated which incorporates two different turbulence models and a laminar model for the porous medium. A low-Reynolds number k-e turbulence model is used for the fluid layer in all cases. The resulting CFD predictions reflect well the effects of the changes in the permeability of the porous medium as well as the height of the fluid layer. However, the predictions are not as reliable in showing the changes due to the thickness of the porous medium. Predictions with one of the turbulence models with only Darcy damping in the turbulence transport equations for the porous medium is shown to give better qualitative comparisons for the gross flow patterns. Part II of this paper presents laser Doppler velocimetry measurements for the same system and comparisons of these measurements with the CFD simulations for a quantitative evaluation of the mathematical model. © 2001 Published by Elsevier Science Ltd.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/cesen_US
dc.relation.ispartofChemical Engineering Scienceen_US
dc.subjectCfd Simulationsen_US
dc.subjectFlow Visualisationsen_US
dc.subjectModellingen_US
dc.subjectPorous Mediaen_US
dc.subjectTurbulenceen_US
dc.titleImpinging round jet studies in a cylindrical enclosure with and without a porous layer: Part I - Flow visualisations and simulationsen_US
dc.typeArticleen_US
dc.identifier.emailLi, Y:liyg@hkucc.hku.hken_US
dc.identifier.authorityLi, Y=rp00151en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/S0009-2509(01)00102-6en_US
dc.identifier.scopuseid_2-s2.0-0035927601en_US
dc.identifier.hkuros68505-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035927601&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume56en_US
dc.identifier.issue12en_US
dc.identifier.spage3855en_US
dc.identifier.epage3878en_US
dc.identifier.isiWOS:000169709500018-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridPrakash, M=7101767972en_US
dc.identifier.scopusauthoridTuran, ÖF=7003600354en_US
dc.identifier.scopusauthoridLi, Y=7502094052en_US
dc.identifier.scopusauthoridMahoney, J=7202430280en_US
dc.identifier.scopusauthoridThorpe, GR=7006529301en_US

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