Impacts of solid stress model on MP-PIC simulation of a CFB riser with EMMS drag
Impacts of solid stress model on MP-PIC simulation of a CFB riser with EMMS drag
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固体应力模型对带有 EMMS 阻力的 CFB 立管 MP-PIC 仿真的影响
DOI：
10.1016/j.powtec.2019.06.018
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发表时间：
2019-09
影响因子：
5.2
通讯作者：
Wang Wei
中科院分区：
文献类型：
--
作者：
Kadyrov Tagir;Li Fei;Wang Wei
基于团簇的EMMS(能量最小化多尺度)阻力模型与MP-PIC(多相粒子单元)方法相结合，成功地模拟了循环床内的流态化行为。固体法向应力模型在MP-PIC模拟中占有重要地位，但目前还缺乏深入的研究，特别是在循环床提升管模拟中。在这项工作中，研究了固体法向应力模型参数的影响，通过使用MFIX(多相流与相间交换)开源程序对实验室规模的循环床提升管进行了二维模拟。结果表明，当固体接近密实堆积状态时，固体应力参数的作用更为显著。通过对模拟结果和实验数据的比较以及模拟时间的比较，得出了固体应力模型参数的最佳值。还研究了用于二维模拟的第三方向的厚度。增加厚度会带来额外的计算成本，而对精度影响很小，厚度的推荐值是单个颗粒的直径。
The cluster-based EMMS (energy minimization multi-scale) drag model in combination with MP-PIC (multi-phase particle in cell) method can successfully simulate the fluidization behavior in CFBs (circulating fluidized beds). The solid normal stress model is very important to MP-PIC simulations, but still lacks thoroughly investigation, especially in CFB riser simulation. In this work, the effects of parameters from the solid normal stress model have been investigated by using 2D simulations of a laboratory-scale CFB riser with MFIX (Multiphase Flow with Interphase eXchanges) open-source code. The results show that the role of the solid stress parameters is more significant when the solid approaches close packing state. Based on the comparison between simulation results and experimental data and the elapsed simulation time, optimal values for the solid stress model parameters were obtained. The thickness of the third direction for 2D simulations has also been investigated. Increase of the thickness entails additional computational costs with little effect on the accuracy and the recommended value of thickness is the diameter of one single particle.
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影响因子：
15.1
作者：
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通讯作者：
Liqiang Lu;A. Konan;S. Benyahia
影响因子：
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影响因子：
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