Abstract：A gas-particle computational fluid dynamics flow model was developed to simulate the flow behavior in the three dimensional fluidized bed to evaluate fluidization performance of a bulk cement tank truck. The computational model was based on the Eulerian two-phase flow model. In the model, the Gidaspow drag coefficient model was applied to coupling force between the gas and solid phases. Spatial profiles of the fluid volume fraction showed that it is a bubbling type fluidized bed. The simulation results predict fluidization bed is rendered into a non-uniform flow state, and the solid particles are not completely fluidized, led to cement residue at the end of discharging process. The results show that it is reasonable to set discharge outlet diameter to100~120 mm, discharge outlet height to 40~55 mm, fluidized bed slope to 10~15°. The sliding plate slope must be greater than 40°。

Keywords: fluidization performance; gas -particle flow model; bulk cement tank truck; fluent software