  A new hybrid RANS/LES technique, based on the hybrid filter proposed by
Germano in 2004, has been studied. The novelty herein introduced is represented
by the reconstruction of the Reynolds stress tensor. As a consequence, no
explicit RANS model is needed. The RANS and LES terms are merged using a
constant blending factor. The model is implemented in a numerical code based on
a high order Discontinuous Galerkin (DG) finite element formulation. The test
case considered for numerical simulations is the turbulent tur- bulent channel
flow at Mach = 0.2. The comparison with available DNS data shows a good
agreement and, in general, an improvement with re- spect to pure LES results,
confirming that the technique herein proposed represents a promising approach
to the numerical simulation of turbulent flows.
