It was shown recently that the use of stochastic analysis enables a theoretically well based, systematic derivation of a realizable linear dynamic model (LDM). It had been shown that the realizable dynamic model has significant advantages compared to other dynamic models for attached flows. In this study, the performance of the LDM is investigated for a highly separated flow: a periodic hill flow is simulated at a Reynold number of 10,600. The performance of LDM is compared with the dynamic Lagrangian SGS model and the dynamic one-equation eddy model. It is found that the LDM has advantages compared to the other two dynamic models in predicting the complicated flow features, especially the separation bubble and reattachment point.
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