Initial conditions and modeling for simulations of shock driven turbulent material mixing

We first simulate canonical shock-tube (AWE and CEA) experiments with an implicit LES (ILES) strategy. We report new validation studies benchmarking ILES with the available turbulence velocity and mixing data from the CEA laboratory studies. In turn, the ILES generated flow data is then used to initialize and as reference to assess the 3D URANS. We find that by prescribing (ILES generated) physics-based 3D IC and allowing for 3D convection with just enough resolution, the computed dissipation in 3D URANS blends effectively with the modeled dissipation to yield significantly improved statistical predictions.