Large eddy simulation of compressible flow using a parallel, multigrid driven algorithm

1996 ◽  
Author(s):  
Eran Arad ◽  
Luigi Martinelli
Keyword(s):  
Large Eddy Simulation ◽  
Compressible Flow ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Parallel Multigrid

Compressible-Flow Simulations Using a New Large-Eddy Simulation/Reynolds-Averaged Navier-Stokes Model

AIAA Journal ◽  
2011 ◽  
Vol 49 (10) ◽  
pp. 2194-2209 ◽  
Author(s):  
Daniel A. Gieseking ◽  
Jung-Il Choi ◽  
Jack R. Edwards ◽  
Hassan A. Hassan
Keyword(s):  
Large Eddy Simulation ◽  
Compressible Flow ◽  
Navier Stokes ◽  
Flow Simulations ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Reynolds Averaged Navier Stokes

Large Eddy Simulation of the Compressible Flow Over an Open Cavity

2002 ◽  
Author(s):  
Keon-Je Oh ◽  
Tim Colonius
Keyword(s):  
Large Eddy Simulation ◽  
Shear Layer ◽  
Dynamic Model ◽  
Compressible Flow ◽  
Stokes Equations ◽  
Open Cavity ◽  
Mean Flow ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Model Coefficient

Large eddy simulation is used to investigate the compressible flow over a open cavity. The sub-grid scale stresses are modeled using the dynamic model. The compressible Navier-Stokes equations are solved with the sixth order accurate compact finite difference scheme in the space and the 4th order Runge-Kutta scheme in the time. The buffer zone techniques are used for non-reflecting boundary conditions. The results show a typical flow pattern of the shear layer mode of oscillation over the cavity. The votical disturbances, the roll-up of vorticity, and impingement and scattering of vorticity at the downstream cavity edge can be seen in the shear layer, while the flow inside the cavity is relatively quiescent. The predicted acoustic resonant frequencies are in good agreement with those of the empirical formula. The mean flow streamlines are nearly horizontal along the mouth of the cavity. The pressure has its minimum value in the vortex core inside the cavity. The variation of the model coefficient predicted by the dynamic model is quite large between 0 and 0.3. The model coefficient increases in the stream-wise evolution of the shear layer and sharply decreases near the wall due to the wall effect.

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