Validation of the similar particle assembly (SPA) model for the fluidization of Geldart's group A and D particles
Validation of the similar particle assembly (SPA) model for the fluidization of Geldart's group A and D particles
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DOI：
10.1002/aic.12568
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
M. A. Mokhtar;K. Kuwagi;T. Takami;H. Hirano;M. Horio
中科院分区：
文献类型：
--
作者：
M. A. Mokhtar;K. Kuwagi;T. Takami;H. Hirano;M. Horio
对提出的用于大规模离散元模拟的相似粒子集合模型进行了验证。SPA模型描述了粒子在组件中运动的标度律，它是从粒子的运动方程推导出来的。在SPA模型中，物理或化学性质相似的粒子由单个粒子表示，称为代表性粒子。原始床层中颗粒的局部聚集应该与具有代表性的颗粒一起保持在床层中。通过对二维无粘性颗粒和粘性颗粒的数值模拟，验证了SPA模型的有效性。使用SPA模型，可以使特定放大倍数的代表性颗粒的流动行为与原始颗粒的流动行为相似，而计算量要小得多。得到了SPA床层和原始床层之间气泡尺寸分布的良好近似值。©2011美国化学工程师学会AICHE J，2012
The similar particle assembly (SPA) model proposed for large-scale discrete element method simulation was validated. The SPA model describes the scaling law for the motion of particles in an assembly, which is derived from the equation of motion of a particle. In the SPA model, particles with similar physical or chemical properties are represented by a single particle, which is called the representative particle. The local assembly of particles in the original bed is supposed to be maintained in the bed with the representative particles. The SPA model was validated by numerical simulations of a 2D fluidized bed of noncohesive and cohesive particles. Using the SPA model, the flow behavior of the representative particles of a certain magnification can be made similar to that of the original particles with significantly less computational load. A good approximation of bubble size distribution between the SPA bed and the original bed was obtained. © 2011 American Institute of Chemical Engineers AIChE J, 2012