Subgrid-scale stress modelling based on the square of the velocity gradient tensor

A new subgrid scale model is proposed for Large Eddy Simulations in complex geometries. This model which is based on the square of the velocity gradient tensor accounts for the effects of both the strain and the rotation rate of the smallest resolved turbulent fluctuations. Moreover it recovers the...

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Bibliographic Details
Published in:Flow, turbulence and combustion turbulence and combustion, 1999, Vol.62 (3), p.183-200
Main Authors: NICOUD, F, DUCROS, F
Format: Article
Language:English
Subjects:
Boundary layer and shear turbulence
Engineering Sciences
Exact sciences and technology
Fluid dynamics
Fluid mechanics
Fluids mechanics
Fundamental areas of phenomenology (including applications)
Isotropic turbulence
homogeneous turbulence
Mechanics
Physics
Transition to turbulence
Turbulence simulation and modeling
Turbulent flows, convection, and heat transfer
Wall-bounded thin shear flows
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Summary:A new subgrid scale model is proposed for Large Eddy Simulations in complex geometries. This model which is based on the square of the velocity gradient tensor accounts for the effects of both the strain and the rotation rate of the smallest resolved turbulent fluctuations. Moreover it recovers the proper y(3) near-wall scaling for the eddy viscosity without requiring dynamic procedure. It is also shown from a periodic turbulent pipe flow computation that the model can handle transition.
ISSN:1386-6184
1573-1987
DOI:10.1023/A:1009995426001