Large eddy simulation of turbulent flow over a cavity
Abstract
Smagorinsky and structure-function models are applied to the large eddy simulation of the turbulent flow over a cavity at a Reynolds number Re = 63,600. The near-wall flow region is modeled by implementing either a logarithmic law-of-the-wall or an exponential damping function. Results obtained with two values of the Smagorinsky constant, C(sub s) = 0.10 and 0.20, have been compared. Further, the results provided by the mentioned subgrid-scale models are compared with those obtained using the standard kappa-epsilon model. As a basis for the comparison, LDV measurements of mean and fluctuating turbulent quantities are also reported. The computational results have demonstrated that the use of large eddy simulation is clearly rewarding in face of kappa-epsilon model computation, yielding better results employing a similar number of grid nodes.
- Publication:
-
In AGARD
- Pub Date:
- December 1994
- Bibcode:
- 1994adle.agarR....P
- Keywords:
-
- Cavities;
- Exponential Functions;
- Reynolds Number;
- Simulation;
- Turbulent Flow;
- Vortices;
- Wall Flow;
- Amount;
- Computation;
- Damping;
- Turbulence;
- Fluid Mechanics and Heat Transfer