Abstract

One major drawback of the eddy viscosity subgrid-scale stress models used in large-eddy simulations is their inability to represent correctly with a single universal constant different turbulent fields in rotating or sheared flows, near solid walls, or in transitional regimes. In the present work a new eddy viscosity model is presented which alleviates many of these drawbacks. The model coefficient is computed dynamically as the calculation progresses rather than input a priori. The model is based on an algebraic identity between the subgrid-scale stresses at two different filtered levels and the resolved turbulent stresses. The subgrid-scale stresses obtained using the proposed model vanish in laminar flow and at a solid boundary, and have the correct asymptotic behavior in the near-wall region of a turbulent boundary layer. The results of large-eddy simulations of transitional and turbulent channel flow that use the proposed model are in good agreement with the direct simulation data.

Keywords

TurbulencePhysicsTurbulence modelingMechanicsLaminar flowLarge eddy simulationBoundary layerScale modelLaminar sublayerScale (ratio)Flow (mathematics)Open-channel flowDirect numerical simulationStatistical physicsFlow separationReynolds numberAerospace engineering

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Publication Info

Year
1991
Type
article
Volume
3
Issue
7
Pages
1760-1765
Citations
6969
Access
Closed

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Massimo Germano, Ugo Piomelli, Parviz Moin et al. (1991). A dynamic subgrid-scale eddy viscosity model. Physics of Fluids A Fluid Dynamics , 3 (7) , 1760-1765. https://doi.org/10.1063/1.857955

Identifiers

DOI
10.1063/1.857955