DEM simulation on particle mixing in dry and wet particles spouted bed

作者：Zhu, R. R.^*; Zhu, W. B.; Xing, L. C.; Sun, Q. Q.

来源：Powder Technology, 2011, 210(1): 73-81.

DOI：10.1016/j.powtec.2011.02.025

• Spouted bed
• Particle mixing
• Liquid bridge force
• Discrete element method

In this paper, the mixing characteristics of the dry and wet particles in a rectangular spouted bed are simulated using a three-dimensional discrete element method (DEM). In particular, the influence of turbulence and liquid bridge force is investigated using the standard k-epsilon two-equation model and the Mikami model. The Ashton mixing index is adopted to evaluate the dynamic mixing process of the particle system. The geometry of the simulated bed is the same as that of the experimental bed by Liu et al. [G. Q. Liu, S. Q. Li, X. L Zhao, Q. Yao. Chem. Eng. Sci. 63 (2008) 1131-1141]. The effect of the spouting gas velocity on the mixing process is discussed for the mixing of dry particles (without the liquid bridge force), while the effect of the moisture content is discussed for the mixing of wet particles (with the liquid bridge force).

• 出版日期2011-6-10
• 单位哈尔滨工程大学