DC Field | Value | Language |
---|---|---|
dc.contributor.author | Breuer, Michael | - |
dc.contributor.author | Jaffrézic, Benoit | - |
dc.contributor.author | Delgado, Antonio | - |
dc.contributor.editor | Peng, Shia-Hui | - |
dc.contributor.editor | Haase, Werner | - |
dc.date.accessioned | 2020-06-22T07:41:51Z | - |
dc.date.available | 2020-06-22T07:41:51Z | - |
dc.date.issued | 2008 | - |
dc.identifier.isbn | 978-3-540778134 | - |
dc.identifier.issn | 1612-2909 | - |
dc.description.abstract | Although LES is a highly promising simulation technique, it still suffers from extremely large resources required for the resolution of the near-wall region, especially for high-Re flows. That is the main motivation for setting up hybrid LES-RANS methods. Whereas RANS suits reasonably well to attached boundary layers, requiring much less CPU-time and memory than LES, the latter is recommended for complex large-scale flow phenomena, which RANS often fails to predict correctly. Both characteristics are combined in hybrid LES-RANS methods to obtain an optimal solution at lower cost. Meanwhile a variety of different hybrid concepts were proposed including DES. In the present study a non-zonal approach based on two different but unique models is preferred. The predefinition of RANS and LES regions is avoided and a gradual transition between both methods takes place which weakens the problem of setting up an appropriate coupling strategy. The new hybrid LES-RANS approach relies on a one-equation model for the turbulent kinetic energy in both modes. At this phase the model is of linear type. In addition to this linear eddy-viscosity model (LEVM), an explicit algebraic Reynolds stress model (EARSM) is applied in the RANS mode in order to account for the Reynolds stress anisotropy. This insertion leads to a non-linear model. The linear version is used for comparison in order to emphasize the advantages of the non-linear formulation. Both model variants have been tested on the basis of the standard plane channel flow and the flow over a periodic arrangement of hills. © 2008 Springer-Verlag Berlin Heidelberg. | - |
dc.description.sponsorship | Strömungsmechanik | - |
dc.language.iso | eng | - |
dc.publisher | Springer | - |
dc.relation.ispartof | Notes on Numerical Fluid Mechanics and Multidisciplinary Design | - |
dc.title | Hybrid LES-RANS method based on an explicit algebraic Reynolds stress model | - |
dc.type | Conference Object | - |
dc.relation.conference | 2nd Symposium on Hybrid RANS-LES Methods 2007 | - |
dc.identifier.doi | 10.1007/978-3-540-77815-8_5 | - |
dc.identifier.scopus | 2-s2.0-38649130693 | - |
dcterms.bibliographicCitation.volume | 97 | - |
dcterms.bibliographicCitation.pagestart | 487 | - |
dcterms.bibliographicCitation.pageend | 492 | - |
dcterms.bibliographicCitation.originalpublisherplace | Berlin | - |
dcterms.bibliographicCitation.booktitle | Advances in hybrid RANS-LES modelling : papers contributed to the 2007 Symposium of Hybrid RANS-LES Methods, Corfu, Greece, 17-18 June, 2007 | - |
local.submission.type | only-metadata | - |
dc.type.conferenceObject | Conference Paper | - |
item.languageiso639-1 | en | - |
item.fulltext_s | No Fulltext | - |
item.openairetype | Conference Object | - |
item.grantfulltext | none | - |
item.fulltext | No Fulltext | - |
crisitem.author.dept | Strömungsmechanik | - |
crisitem.author.orcid | 0000-0003-4467-478X | - |
crisitem.author.parentorg | Fakultät für Maschinenbau und Bauingenieurwesen | - |
Appears in Collections: | 3 - Publication references (without fulltext) |
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