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Simulation of the flow over the caarc standard tall building using different LES turbulence models

Lygidakis Georgios, Sarakinos Sotirios, Nikolos Ioannis

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URIhttp://purl.tuc.gr/dl/dias/1EC5CEB3-A850-465B-B83E-AF300DA6D1C3-
Identifierhttps://doi.org/10.1115/IMECE2016-66399-
Identifierhttp://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2601874-
Languageen-
Extent10 pagesen
TitleSimulation of the flow over the caarc standard tall building using different LES turbulence modelsen
CreatorLygidakis Georgiosen
CreatorΛυγιδακης Γεωργιοςel
CreatorSarakinos Sotiriosen
CreatorΣαρακηνος Σωτηριοςel
CreatorNikolos Ioannisen
CreatorΝικολος Ιωαννηςel
Publisher American Society of Mechanical Engineers (ASME)en
Content SummaryThe simulation of unsteady turbulent flows remains a significant problem in CFD despite the tremendous advances in the performance of supercomputers during the past decades. Considering this state, the enhancement of the in-house academic CFD solver Galatea-I with the LES approach is reported in this study. LES is actually a compromise between the RANS and DNS methods, entailing though increased accuracy, comparing to the first one, and less computational load than the second. Particularly, four Sub-Grid Scale models have been incorporated, namely, the Smagorinsky, the WALE, the dynamic Germano-Lilly and the dynamic kinetic energy one. They were validated against a real 3D problem, concerning turbulent flow over the CAARC standard tall building model, a specially designed geometry for wind tunnel experiments on tall buildings. Independently of the implemented modelling approach, the extracted results appear to be close with the available experimental and numerically computed data, confirming the potential of Galatea-I to encounter such simulations. The last two models are revealed to be the most accurate ones, a conclusion actually expected due to their more sophisticated formulation. An additional simulation was performed with the RANS approach and the SST model, which confirmed the superiority of the LES methodology in terms of accuracy.en
Type of ItemΠλήρης Δημοσίευση σε Συνέδριοel
Type of ItemConference Full Paperen
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2018-11-01-
Date of Publication2016-
SubjectCAARC standard tall buildingen
SubjectIncompressible flowen
SubjectLarge eddy simulationen
SubjectNode-centered finite-volume schemeen
Bibliographic CitationG. N. Lygidakis, S. S. Sarakinos and I. K. Nikolos, "Simulation of the flow over the caarc standard tall building using different LES turbulence models," in ASME 2016 International Mechanical Engineering Congress and Exposition, 2016. doi: 10.1115/IMECE2016-66399 en

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