Kinetic theory modeling energy dissipation rate

The primary task of modelling two-phase reaction systems is the estimation of the average diameter of droplets (bubbles and so on) of a dispersed phase and their size distribution in fast interface processes in diffuser-confusor devices. According to Kholmogorov s theory of isotropic turbulence, the specific kinetic energy of turbulence dissipation rates e are limiting in this case. 

The transport equations for the turbulent kinetic energy, k, and the turbulence dissipation, e, in the RNG k-s model are again defined similar to the standard k-s model, now utilizing the effective viscosity defined through the RNG theory. The major difference in the RNG k-s model from the standard k-s model can be found in the e balance where a new source term appears, which is a function of both k and s. The new term in the RNG k- s model makes the turbulence in this model sensitive to the mean rate of strain. The result is a model that responds to the effect of strain and the effect of streamline curvature,... 

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