Influence of the turbulence representation at the inlet on the downstream flow pattern in LES of backward-facing step

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dc.contributor.authorVolavý, Jaroslavcs
dc.contributor.authorForman, Matějcs
dc.contributor.authorJícha, Miroslavcs
dc.coverage.issue1cs
dc.coverage.volume25cs
dc.date.accessioned2020-08-01T06:57:27Z
dc.date.available2020-08-01T06:57:27Z
dc.date.issued2012-04-09cs
dc.description.abstractThe impact of the choice of inlet boundary condition treatment on the fluid flow is studied in this work. The correct representation of the turbulence at the inlet to the domain is essential for the accuracy of Large Eddy Simulation. The inappropriate specification of the inlet velocity has significant effect on the downstream flow pattern. The case of backward-facing step was used as a test case. Three different approaches of the inlet boundary conditions were studied: uniform velocity profile, mean velocity profile of the fully developed channel flow and velocity obtained from mapping velocity from plane positioned behind the inlet back to the inlet. The results of the simulations were compared with experimental results. It has shown, that using uniform velocity profile on inlet and even prescribing turbulent mean velocity profile without proper representation of turbulence fluctuations leads to unrealistic results.en
dc.description.abstractThe impact of the choice of inlet boundary condition treatment on the fluid flow is studied in this work. The correct representation of the turbulence at the inlet to the domain is essential for the accuracy of Large Eddy Simulation. The inappropriate specification of the inlet velocity has significant effect on the downstream flow pattern. The case of backward-facing step was used as a test case. Three different approaches of the inlet boundary conditions were studied: uniform velocity profile, mean velocity profile of the fully developed channel flow and velocity obtained from mapping velocity from plane positioned behind the inlet back to the inlet. The results of the simulations were compared with experimental results. It has shown, that using uniform velocity profile on inlet and even prescribing turbulent mean velocity profile without proper representation of turbulence fluctuations leads to unrealistic results.cs
dc.formattextcs
dc.format.extent485-489cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationEPJ Web of Conferences. 2012, vol. 25, issue 1, p. 485-489.en
dc.identifier.doi10.1051/epjconf/20122501099cs
dc.identifier.isbn978-80-7372-784-0cs
dc.identifier.issn2100-014Xcs
dc.identifier.other75193cs
dc.identifier.urihttp://hdl.handle.net/11012/193619
dc.language.isoencs
dc.publisherEDP Sciencescs
dc.relation.ispartofEPJ Web of Conferencescs
dc.relation.urihttps://www.epj-conferences.org/articles/epjconf/abs/2012/07/epjconf_EFM2011_01099/epjconf_EFM2011_01099.htmlcs
dc.rightsCreative Commons Attribution 2.0 Genericcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2100-014X/cs
dc.rights.urihttp://creativecommons.org/licenses/by/2.0/cs
dc.subjectLarge Eddy Simulationen
dc.subjectbackward facing stepen
dc.subjectinlet boundary conditionen
dc.subjectLarge Eddy Simulation
dc.subjectbackward facing step
dc.subjectinlet boundary condition
dc.titleInfluence of the turbulence representation at the inlet on the downstream flow pattern in LES of backward-facing stepen
dc.title.alternativeInfluence of the turbulence representation at the inlet on the downstream flow pattern in LES of backward-facing stepcs
dc.type.driverconferenceObjecten
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-75193en
sync.item.dbtypeVAVen
sync.item.insts2020.08.01 08:57:27en
sync.item.modts2020.08.01 08:16:27en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Energetický ústavcs
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