A scaled MP-PIC method for bubbling fluidized beds
A scaled MP-PIC method for bubbling fluidized beds
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鼓泡流化床的规模化 MP-PIC 方法
DOI：
10.1016/j.powtec.2022.117501
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发表时间：
2022-05
影响因子：
5.2
通讯作者：
Wei Wang
中科院分区：
文献类型：
--
作者：
Xing Zhao;Yong Jiang;Fei Li;Atta Ullah;Wei Wang
粗粒化技术在气固流态化模拟中有着广泛的应用。然而，作为一个关键参数，粗粒化率及其相关的标度律还远未达成共识。在这项工作中，一个标度律的基础上的相似性分析，然后它被用来缩放的多相粒子在细胞（MP-PIC）方法。然后通过模拟两个鼓泡流化床来验证该方法。模拟结果表明，在较宽的粗粒化比范围内，比例MP-PIC减小了模拟条件下固体体积分数和速度分布的误差。在未来，考虑到一个包裹或数值颗粒内部的非均匀性的比例律将被开发，预计将进一步提高流化床模拟中的粗粒度建模的性能。·推导了颗粒间接触力和曳力的标度律。·数值颗粒的颗粒间接触力和拖曳力分别遵循k 2和k 3的标度。·将标度律应用于MP-PIC方法，并在鼓泡流化床模拟中得到验证。·标度律可以在较宽的粗粒化比范围内减小模拟误差。
Coarse-graining is widely used in simulations of gas-solid fluidization. However, as a key parameter, the coarse-graining ratio, and its relevant scaling law is still far from reaching a consensus. In this work, a scaling law is developed based on a similarity analysis, and then it is used to scale the multi-phase particle-in-cell (MP-PIC) method. The approach is then validated by simulating two bubbling fluidized beds. The simulation results show that scaled MP-PIC reduces the errors of solids volume fraction and velocity distributions over a wide range of coarse-graining ratios for simulated conditions. In future, a scaling law with consideration of the heterogeneity inside a parcel or numerical particle will be developed which is expected to further improve the performance of coarse-grained modeling in simulation of fluidized beds. • The scaling laws of interparticle contact force and drag force were derived. • The interparticle contact force and drag force of numerical particle follows a scaling of k 2 and k 3 , respectively. • The scaling law was applied in the MP-PIC method, and validated in the simulations of bubbling fluidization beds. • The scaling law can reduce the simulation errors over a wide range of coarse-graining ratio.
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