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Embedded LES using PANS
FOI, Swedish Defence Research Agency.
2011 (English)Conference paper (Refereed)
Abstract [en]

An embedded LES modelling approach is explored and verified using the PANS (PartiallyAveraged Navier-Stokes) model as a platform. With the same base model, theturbulence-resolving LES region is embedded by setting the PANS model coefficient tofk < 1 as distinguished from its neighboring RANS region, where fk = 1 is specified. Theembedded LES approach is verified in computations of a turbulent channel flow and aturbulent flow over a hump. Emphasis is placed on the impact of turbulent conditions atthe RANS-LES interface using anisotropic velocity fluctuations generated from syntheticturbulence. The effects of model coefficient fk in the LES region, as well as of the spanwisesize of the computational domain and the grid resolution in this direction, are alsoinvestigated. It is shown that the embedded LES method based on the PANS modellingapproach is computationally feasible and able to provide reasonable turbulence-resolvingpredictions in the embedded LES region.

Place, publisher, year, edition, pages
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-85791OAI: diva2:500119
6th AIAA Theoretical Fluid Mechanics Conference. Honolulu, Hawaii. 27 - 30 Jun 2011
QC 20120411Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2012-04-11Bibliographically approved

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Peng, Shia Hui
Fluid Mechanics and Acoustics

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