A Mixed RANS/LES Model Applied to the Channel Flow

In the paper we present some preliminary results related to a new LES approach, the mixed RANS/LES modelling technique that should exploit both the experience accumulated in RANS modelling, particularly near the wall, and the LES capabilities. This new approach was first presented to the APS/DFD Meeting of Baltimore in 2012 [1] and represents a particular application of the general Hybrid RANS/LES filtering technique. Here in particular we have applied this new mixed RANS/LES modelling technique to the channel flow in the particular case of exact RANS databases as regards the RANS model and the no-model and the dynamic anisotropic model as regards the LES aspect. The results are interesting and promising for a simple implementation in different codes with different models.