New turbulence model for gas-liquid two-phase bubbly flow

Based on the standard single phase turbulent flow model, a new turbulence model is put forward to model the gas-liquid two-phase bubbly flow in a general non-orthogonal curvilinear co-ordinate system. In this model, the dissipation of the turbulent kinetic energy of gas bubbles is governed by the dissipation equations of the gas bubbles. The convection, diffusion, production and dissipation of the turbulent kinetic energy of bubbles, and the coupling interaction between the mass, momentum, and energy of two fluids are taken into account. Theoretically speaking it is a more perfect model than the k-ε or k-ε-k_p. predicted results by using this model for the gas-liquid two-phase flow in a straight duct are in satisfactory agreement with the experimental data in the literature, with a maximum relative deviation of less than 20% within the investigated range.