Shearless turbulence - wall interaction: a DNS database for second-order closure modeling

摘要

With the aim to get a better insight of wall-turbulence interaction, we designed an original configuration where a random forcing replace usual shear-related mechanisms of turbulence production. The synthesized turbulence diffuses by itself from a central plane layer, and continuously feeds on both sides a solid-wall or free-slip-surface with a shearless agitation. This specific situation allows to understand the blocking effect induced by the normal velocity cancelation at the surface, and is particularly relevant to quantify the intercomponent energy transfer occurring in this region. The configuration, extensively described in [1], can be seen as the numerical