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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ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
July 14–18, 2002
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-3615-0
PROCEEDINGS PAPER
Large Eddy Simulation of the Compressible Flow Over an Open Cavity Available to Purchase
Keon-Je Oh,
Keon-Je Oh
Kyungnam University, Masan, South Korea
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Tim Colonius
Tim Colonius
California Institute of Technology, Pasadena, CA
Search for other works by this author on:
Keon-Je Oh
Kyungnam University, Masan, South Korea
Tim Colonius
California Institute of Technology, Pasadena, CA
Paper No:
FEDSM2002-31352, pp. 1173-1178; 6 pages
Published Online:
February 24, 2009
Citation
Oh, K, & Colonius, T. "Large Eddy Simulation of the Compressible Flow Over an Open Cavity." Proceedings of the ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. Volume 1: Fora, Parts A and B. Montreal, Quebec, Canada. July 14–18, 2002. pp. 1173-1178. ASME. https://doi.org/10.1115/FEDSM2002-31352
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