MP-PIC simulation of CFB riser with EMMS-based drag model
MP-PIC simulation of CFB riser with EMMS-based drag model
复制标题
使用基于 EMMS 的阻力模型对 CFB 立管进行 MP-PIC 仿真
DOI：
10.1016/j.ces.2012.07.020
复制
发表时间：
2012-09-12
影响因子：
4.7
通讯作者：
Li, Jinghai
中科院分区：
文献类型：
--
作者：
Li, Fei;Song, Feifei;Li, Jinghai
利用开源程序MFIX实现了多相粒子单元(MP-PIC)方法与能量最小化多尺度(EMMS)阻力模型相结合，对循环床(CFB)提升管内的气固两相流动进行了数值模拟。由EMMS阻力计算的固体通量与实验值吻合较好，而传统的均匀阻力则高估了这一数值。EMMS阻力模型也可以预测宏观和细观结构。EMMS阻力模型的计算结果与实验测量结果的定量对比表明，该模型具有较高的精度。文中还研究了每个包裹的粒子数量和壁面条件对模拟结果的影响。结果表明，MP-PIC与EMMS阻力模型相结合可以成功地模拟循环床提升管内的流态化流动，为今后实现工业过程的实时模拟奠定了基础。(C)2012爱思唯尔有限公司。保留所有权利。
MP-PIC (multi-phase particle in cell) method combined with the EMMS (energy minimization multiscale) drag force model was implemented with the open source program MFIX to simulate the gas-solid flows in CFB (circulating fluidized bed) risers. Calculated solid flux by the EMMS drag agrees well with the experimental value; while the traditional homogeneous drag over-predicts this value. EMMS drag force model can also predict the macro- and meso-scale structures. Quantitative comparison of the results by the EMMS drag force model and the experimental measurements show high accuracy of the model. The effects of the number of particles per parcel and wall conditions on the simulation results have also been investigated in the paper. This work proved that MP-PIC combined with the EMMS drag model can successfully simulate the fluidized flows in CFB risers and it serves as a candidate to realize real-time simulation of industrial processes in the future. (C) 2012 Elsevier Ltd. All rights reserved.