Abstract
DES are applied to confined turbulent swirling flows exhibiting vortex breakdown. The DES results are compared with measurements obtained on a water test rig operating at a Reynolds number of 4600, and with further predictions obtained via different modelling strategies such as the Reynolds Stress Model (RSM) based URANS and LES. In the LES, the standard Smagorinsky model, and its modification by Voke are used as the subgrid scale models. DES and LES results are observed to be in better agreement with the experiments, compared to the URANS-RSM predictions. The overall performance of DES is observed to be similar to that of LES computations, though, a slight superiority of DES compared to LES can still be claimed, for the considered test case.
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Benim, A.C., Escudier, M.P., Nahavandi, A., Nickson, K., Syed, K.J. (2008). DES Analysis of Confined Turbulent Swirling Flows in the Sub-critical Regime. In: Peng, SH., Haase, W. (eds) Advances in Hybrid RANS-LES Modelling. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 97. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-77815-8_18
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DOI: https://doi.org/10.1007/978-3-540-77815-8_18
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