Within the framework of the two-fluid approach, gas was treated with a large-eddy simulation and a sub-grid-scale (SGS) turbulent kinetic energy model while particles were treated with a second-order-moment method to describe the anisotropy of the fluctuating velocity. A modified Simonin model was derived for the gas–solid interphase fluctuating energy transfer. The anisotropic gas–solid flow in a circulating fluidized bed was investigated. Predictions were in good agreement with experimental data. The distributions of the second-order moment of particles and SGS-turbulent kinetic energy of gas were simulated at different solid mass fluxes. The effects of the solid mass flux on the particle second-order moment, particle anisotropic behavior, gas SGS-turbulent kinetic energy and gas SGS energy dissipation were analyzed for the circulating fluidized bed.

在双流体方法的框架内，对气体进行了大涡模拟和亚网格规模（SGS）湍动能模型处理，而对颗粒进行了二次矩法处理，以描述各向异性。波动速度。推导了修正的西蒙宁模型，用于气固相间波动的能量传递。研究了循环流化床中的各向异性气固两相流。预测与实验数据非常吻合。在不同的固体质量通量下，模拟了气体的二阶矩分布和气体的SGS湍动能。固体质量通量对粒子二阶矩，粒子各向异性行为，