A dynamic hybrid Reynolds-averaged Navier Stokes-Large eddy simulation modeling framework

A dynamic framework for hybrid Reynolds-averaged Navier-Stokes (RANS)-large eddy simulation (LES) modeling is proposed, wherein the RANS-to-LES transition parameter is adjusted to maintain continuity in turbulence production. The model is applied for temporally developing plane channel flow at varyi...

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Bibliographic Details
Published inPhysics of fluids (1994) Vol. 24; no. 1; pp. 015103 - 015103-7
Main Authors Bhushan, S., Walters, D. K.
Format Journal Article
LanguageEnglish
Published Melville, NY American Institute of Physics 01.01.2012
Subjects
Computational methods in fluid dynamics
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Physics
Turbulence simulation and modeling
Turbulent flows, convection, and heat transfer
Large eddy simulation
Pipe flow
Digital simulation
Vorticity
Modelling
Mesh generation
Turbulence structure
Navier-Stokes equations
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Summary:A dynamic framework for hybrid Reynolds-averaged Navier-Stokes (RANS)-large eddy simulation (LES) modeling is proposed, wherein the RANS-to-LES transition parameter is adjusted to maintain continuity in turbulence production. The model is applied for temporally developing plane channel flow at varying Reynolds numbers with different initial turbulence intensity and grid resolution. On sufficiently fine grids, dynamic hybrid RANS-LES model (DHRL) yields similar results to LES simulations. On coarse grids, DHRL activates RANS mode in the log layer, thus improving the mean flow predictions. The model framework addresses grid sensitivity issues observed in other hybrid RANS-LES approaches and may be used with any desired combination of LES and RANS basis models.
ISSN:1070-6631
1089-7666
DOI:10.1063/1.3676737