Analysis of the subgrid models in the flow between rotating discs

The paper presents the results of the LES computations of the flow between rotating discs using high-order numerical code. The results of simulation for fully turbulent flow, obtained using various subgrid models (dynamic Smagorinsky [6]. WALE [11] and HPF [18]) are compared with available DNS data. Besides the averaged quantities an additional attention was devoted to the temporal evolution of the flow field. The dynamic Smagorinsky and WALE models can be regarded as a parameter free while in the case of HPF model a high-pass filtering procedure requires some parameters which influence the model behavior. We found that in this type of flow this procedure should be directly related to the numerical scheme applied. Otherwise the results depend on the initial flow conditions and the predicted evolution of turbulent flow may be distorted.