基于PBM和DPM的喷雾冷冻流化床液滴雾化的数值模拟

Numerical simulation of droplets atomization in spray-freezing fluidized bed based on DPM and PBM

为实现均匀包覆,对流化床包覆的流场及颗粒的团聚特性进行研究;基于CFD中的群体平衡模型对流化床内液滴的雾化行为进行二维数值模拟,并与离散相模型的计算结果进行对比。结果表明,群体平衡模型和离散相模型可得出相同的速度场分布,群体平衡模型可进一步得出更为详细的粒径分布。群体平衡模型可作为离散相模型的替代模型进一步研究颗粒的聚并和破碎行为。

In-order-to-realize-the-uniform-coating,-the-flow-field-of-spray-freeze-fluidized-bed-and-the-agglomeration-characteristics-of-the-particles-need-to-be-made-a-further-investigation.-The-atomization-behavior-of-droplets-in-the-fluidized-bed-was-simulated-based-on-the-population-balance-model（PBM）-in-CFD,and-the-results-were-compared-with-those-of-the-discrete-phase-model（DPM）.-The-results-show-that-PBM-and-DPM-can-be-used-to-obtain-the-same-velocity-field-distribution-and-PBM-can-be-used-to-obtain-a-more-detailed-particle-size-distribution.-Therefore,PBM-can-be-used-as-an-alternative-model-of-DPM-to-further-investigate-the-coalescence-and-fragmentation-behavior-of-particles.