Numerical Simulation Of The Gas-Solid Flow In Spouted Beds

The flow field characteristic of the gas-solid two-phase fluid in spouted bed was simulated, detailed information of the particle movement was considered,it provided the theory to the experimentation and industrialization.The profile of the velocity vector,the volume fraction of the particle and turbulence kinetic energy in different spouted bed was obtained.The influence of the different taper and entrance gas velocity for the single nozzle spouted bed was considered.The simulation result showed that:The flow field profile was perfect when the entrance gas velocity was 0.58m·s^-1 and the taper was 60°for the single nozzle spouted bed,the distinct character of the spout,fountain and annulus have been obtained;The spouting state was stably when the range of the entrance Renolds number was 3285i/D<0.45,the model was ideally for the same draft tube diameter when the rate of the draft tube setting height and entrance diameter was 1i/d_in<1.33.