Compressible Navier-Stokes Equations - Building in an atmospheric boundary layer

Building in a turbulent flow (Re: ). The mean velocity of the wind in the atmospheric boundary layer (0-40m) is (Beaufort 5-6). The numerical simulation (2D) is done by OpenFOAM 2.0. The fully compressible Navier-Stokes equations were calculated, using a LES-model. Shown is the turbulent kinetic energy k. The size of the mesh is 120m x 40m (the buildings height is 10m), grid points ca. 150000.