The gas-solid flow and mixing behavior in two dimensional downers with different entrance structures were simulated by using a CFD-DEM method.

• 采用计算流体力学和离散单元模型(CFD-DEM)耦合一种简单的气固催化反应模型,对具有不同入口结构的二维下行床内的气粒流动和混合行为进行全床数值模拟。