Abstract
New numerical results concerning unstably stratified homogeneous turbulence are presented. The system of equations considered gives the dynamics of homogeneous incompressible binary mixtures submitted to a gravity field in the low Atwood number limit (Boussinesq approximation). It allows to gain insight into several characteristics relevant to buoyancy driven turbulent mixing, such as unsteadiness and anisotropy. In this work, the dependency of the asymptotic self-similar states on different dissipation processes is extensively explored. The resulting states are shown to agree with recent theoretical predictions based on a large scale dynamics analysis.
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