On the return to isotropy of compressible anisotropic turbulence
Résumé
In the present paper, the behaviour of compressible anisotropic turbulence is investigated using Direct Numerical Simulation (DNS). The computational code is based on a finite volume formulation of the explicit predictor-corrector MacCormack scheme. Decay simulations of homogeneous turbulence are carried out through specifying a constant mean flow and adding an initial anisotropic fluctuating velocity field. A specific parameterization of anisotropy allows us to explore several anisotropic decay situations. The impact of the nature of the initial anisotropic turbulence on turbulent kinetic energy decay is underlined. A specific decomposition of the turbulent kinetic energy budget permits to study the return to-isotropy phenomenon.
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