采用DBS曳力模型计算气液相间作用，分别采用Gidaspow曳力模型、经Brucato修正的Gidaspow曳力模型和Schiller?Naumann曳力模型计算液固相间作用，忽略气固间的直接作用，对比了浆态床内不同颗粒粒径体系轴向固含率的模拟和实验结果. 结果表明，不同液固相间曳力模型对气含率的预测影响不大；在颗粒粒径较大(140 ?m)的体系中，较低表观气速下气液DBS与液固Schiller?Naumann曳力模型组合模拟的固含率随床高度增加而减小，与实验结果吻合，而其它曳力模型组合的模拟结果较差，轴向分布较均匀；在颗粒粒径较小(35 ?m)的体系中，几种曳力模型组合的模拟结果均与实验结果吻合较好，轴向分布较均匀.
DBS drag model for gas?liquid interaction, and three drag models for liquid?solid interaction including Gidaspow model, Gidaspow?Brucato model and Schiller?Naumann model were used to simulate slurry bubble columns without considering the direct interaction between gas and solid. The simulation and experimental results of axial solid holdup with different particle sizes were compared. The results showed that different liquid?solid drag models had minor influence on the prediction of gas holdup. The combination of DBS drag model and Schiller?Naumann model had a better prediction for the systems of larger particle size (140 ?m) at lower gas velocity. The solids holdup decreased with increasing the column height, whereas other models fail to predict the axial solids holdup distribution. These different liquid?solid drag models performed well for the systems of smaller particle size (35 ?m).
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