气泡羽流的双流体两方程湍流模型

A two fluid,two equation turbulence model for bubble plumes

从双流体概念出发，结合气—液两相流的特点，建立了描述两相湍流流动两方程模型，两方程为液相湍动能（ｋ）方程和湍动能耗散率（ε）方程．通过对各时均运动方程和两方程中三阶以下湍流相关项作模型化处理，完成了两相流基本方程组的封闭，并将模型用于均匀环境中圆形气泡羽流的数值计算，初步证实了其正确有效性．

A two fluid,two equation turbulence model for two phase flow is proposed.The two equations are of the kinetic energy of turbulence ( k ) and the rate of dissipation of that energy (ε) for liquid phase.Closure of the time mean equation is achieved by modelling the turbulent correlations up to third order,in the equations of the mean motion,kinetic energy of turbulence and the rate of dissipation of that energy.In order to validate the proposed model,bubble plumes in uniform environment is studied.The predictions of the mean flow properties of this kind flow show good agreement with the experimental data,thus the validity of the model is proved.