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对于A类颗粒,鼓泡流化床中,随着网格尺寸的减小,膨胀高度降低,细网格模拟达到网格无关的值接近于实验数据即网格细化可以预测鼓泡流化床的膨胀高度,但是,当前的计算能力无法达到工业规模反应器的计算要求;流化气速越高,达到网格无关时的网格尺寸越大。与传统的基于平均方法的曳力系数相比,耦合了EMMS厂bubbling曳力系数的双流体(TFM)模型允许使用更粗网格,且准确性大大改善,将为工业化大型反应器模拟提供很好的方法,其中,EMMS/bubbling曳力模型如以前的论文(Shi et a1.,2011)。
For class A particles, bubbling fluidized bed, as the size of the grid decreases, the expansion height decreases, the fine grid simulation to reach the grid irrelevant values close to the experimental data that mesh refinement can predict the bubbling fluidization However, the current computational power does not meet the computational requirements of industrial scale reactors; the higher the fluidized gas velocity, the greater the mesh size when the mesh is unrelated. Compared to the traditional averaging method based drag coefficient, the dual fluid (TFM) model coupled with the bubbling drag coefficient of the EMMS plant allows for the use of a coarser grid with greatly improved accuracy that will provide a very large reactor simulation for industrialization A good method, where the EMMS / bubbling drag model is the same as the previous paper (Shi et al., 2011).