| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1725320 | Ocean Engineering | 2015 | 7 Pages |
Author-Highlights•Turbulent flow behind a cylinder at Re=41,300 is considered in the frame of 3-D LES.•The performance comparison of the well-known SGS models is examined in details.•The most appropriate SGS model is carefully discussed and verified by experiment.•A dynamic model with damping function is proposed for such a challenging flow regime.
Results of a numerical evaluation of transitional flow behind a circular cylinder are presented. Three-dimensional calculations are performed in a frame of large eddy simulation at a Reynolds number of 41,300 based on the free stream velocity and cylinder diameter for which previous experimental data is available for comparison. The flow in the transitional regime is characterized by the presence of multiple flow scales such as small-scale shear-layer vortices in freely separating boundary layers and large-scale vortex motion in the wake. Three different subgrid scales, namely the Smagorinsky, k-equation and dynamic k-equation models, are applied in order to evaluate such a challenging flow field at the higher Reynolds number. The effects of the subgrid scale modelling on the main wake parameters and mean flow statistics are discussed in detail and compared to the available experimental measurements for the challenging flow regime.
