Abstract
Large Eddy Simulations (LESs) of flow around a square cylinder at Re = 22 × 103 are performed employing a dynamic one-equation subgrid model. An implicit fractional step method finite-volume code with second-order accuracy in space and time is used. By using a periodic boundary condition, the spanwise dimension is four times the side length of the cylinder. Some global quantities, such as the dominating wake frequency,(Strouhal number) and the mean and RMS values of lift and drag, are computed. Also, a series of time-and spanwise-averaged resolved velocities and turbulent stresses are provided for comparison with experiments. The influence of a finer grid on the results is investigated. Present results are in general agreement with experiments and by using a finer spatial resolution, an even better agreement is found. The dynamic one-equation subgrid model is found to be stable and no sign of the numerical problems usually encountered with the standard dynamic SGS model is observed.
| Original language | English |
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| Title of host publication | Engineering Turbulence Modelling and Experiments |
| Subtitle of host publication | 4th International Symposium on Engineering Modelling and Measurements, May 24-26, 1999, Ajaccio, France |
| Publisher | Elsevier Science Publishers B.V. |
| Pages | 227-236 |
| Volume | 4 |
| ISBN (Print) | 978-0-08-043328-8 |
| DOIs | |
| Publication status | Published - 1999 |
| Event | 4th International Symposium on Engineering Turbulence Modelling and Measurements - Ajaccio, Corsica, France Duration: 1999 May 24 → 1999 May 26 |
Conference
| Conference | 4th International Symposium on Engineering Turbulence Modelling and Measurements |
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| Country/Territory | France |
| City | Ajaccio, Corsica |
| Period | 1999/05/24 → 1999/05/26 |
Subject classification (UKÄ)
- Fluid Mechanics