摘要
A simplified turbulent model and a modified k-Σ two equation model are proposed todescribe the liquid velocity profiles in a bubble column taking into consideration of the effect of gasdrag force and gas hold-up.In the simplified mode1 the Reynolds equation of motion was adoptedand the turbulent viscosity was calculated from an empirical correlation which was deduced fromour experimental data.The calculated liquid velocity profiles were compared between the proposedmodel and the standard k-Σ two equation model as well as experimental data.The result shows thatthe proposed model simulates and predicts the liquid velocity field most satisfactorily and in goodagreement with the experimental measurement.
A simplified turbulent model and a modified k-ε two equation model are proposed to describe the liquid velocity profiles in a bubble column taking into consideration of the effect of gas drag force and gas hold-up. In the simplified model the Reynolds equation of motion was adopted and the turbulent viscosity was calculated from an empirical correlation which was deduced from our experimental data. The calculated liquid velocity profiles were compared between the proposed model and the standard k-ε two equation model as well as experimental data. The result shows that the proposed model simulates and predicts the liquid velocity field most satisfactorily and in good agreement with the experimental measurement.
基金
Supported by the National Natural Science Foundation of China(No.29376253)and the Foundation of State Key Laboratory of Chemical Engineering.
