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Towards detached eddy simulation modelling using a k-equation turbulence model
Swedish Defence Research Agency, FOI.
2006 (English)In: Proceedings of ECCOMAS CFD 2006 / [ed] P. Wesseling, E. O˜nate and J. P´eriaux, 2006Conference paper, Published paper (Refereed)
Abstract [en]

A detached eddy simulation modelling approach is presented for turbulent flowcomputations, which is based on the transport equation for turbulent kinetic energy, k (andthus termed k-DES model). The model coefficients in the RANS form are calibrated inwall-attached flow computations, and the LES mode is calibrated in the simulation for de-caying, homogeneous, isotropic turbulence. To combine the near-wall RANS mode with theoff-wall LES mode, the RANS-LES interface is accomplished by means of an adaptationof turbulent length scales invoked in both the production term and the dissipation term ofthe k-equation. Examples presented for the modelling validation include a fully developedchannel flow, a periodic hill flow and a three-dimensional axisymmetric hill flow. Theresults are compared with available DNS, LES and experimental data, showing reasonableagreement.

Place, publisher, year, edition, pages
2006.
Keyword [en]
Detached Eddy Simulation (DES), Hybrid RANS-LES, k-DES Modelling, k-Equation, Turbulent Length Scale
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-85780OAI: oai:DiVA.org:kth-85780DiVA: diva2:500107
Conference
European Conference on Computational Fluid Dynamics, ECCOMAS CFD 2006. Egmond aan Zee, The Netherlands. 5-8 September 2006
Note
QC 20120528Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2012-05-28Bibliographically approved

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