关键词:

大涡模拟, 双流体模型, 鼓泡床, 数值模拟

Abstract:

Flow behavior of gas and particles was modeled by means of the combination of the large eddy simulations for both gas phase and particles, and the kinetic theory of granular flow for particle collisions (LES-θ-LESp model).The sub-grid scale stress tensors of gas phase and particles were modeled based on the Smagorinsky model with different model constants.The momentum exchange and dissipation by particle collisions was considered by means of the kinetic theory of granular flow.The effect of meso-scale of particles on solids pressure and thermal conductivity was considered.The distributions of concentration and velocity were predicted in a bubbling fluidized bed.The effect of model constants on the distribution of velocity and concentration was discussed.Computation results were compared to experimental results of literatures for particle velocity and concentration of particles, and showed similar trends between simulations and experiments.

Key words:

大涡模拟, 双流体模型, 鼓泡床, 数值模拟