On the convection velocity of wall-bounded turbulence resolved by ZDES mode III at Re θ = 13 000

International audienceWMLES simulations of a flat-plate zero-pressure-gradient boundary layer are done with the Zonal Detached Eddy Simulation Mode III technique over a wide range of Reynolds numbers 3150≤Reθ≤14000. A WMLES field is compared with the WRLES interpolated onto the WMLES mesh. Two interface heights are considered, yinterface=0.1δ and y+interface=3.9√Reτ. The prediction and resolved fraction of mean skin friction is discussed, as well as remaining issues, especially in the logarithmic layer. An excess of high-wavelength streamwise velocity fluctuations is observed below the RANS/LES interface with y+interface=3.9√Reτ, and studied by a spectral convection velocity analysis, leading to the suggestion that it may be a footprint of coherent structures located further away from the wall.ZONAL DETACHED EDDY SIMULATION, REYNOLDS NUMBERS, RANS/LES INTERFACE, CONVECTION VELOCITY