Effects of physical properties of supercritical water on coarse graining of particle cluster  

作　　者：Xiaoyu Li Huibo Wang Yi Li Hui Jin 

机构地区：[1]State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an,710049,China

出　　处：《Particuology》2023年第11期166-178,共13页颗粒学报（英文版）

基　　金：supported by the National Key R&D Program of China(2020YFA0714400).

摘　　要：The coarse graining of particle cluster is of great significance to the study of a fluidized bed. The effects of variations in the physical properties of supercritical water on the coarse graining of particle cluster are investigated in this work. The drag coefficient distributions of the particle cluster are not influenced by the physical properties. However, the physical properties have effects on the values of drag coefficient. The effects of physical properties are weaker in the case of large particle concentrations. Furthermore, the physical properties lead to that the effect of particle cluster wake on the drag of downstream particles being significantly different from that of constant property flow. The variation trend of drag of coarse graining particle is consistent with that of isolated particle. The physical properties lead to significant differences in the values of drag. In this paper, the dominance of the effects of physical properties in a variety of cases is confirmed. Finally, a physical properties effect model is developed accordingly.

关 键 词：Supercritical water Variations in physical properties Fluidized bed Coarse grain method Particle drag 

分 类 号：O35[理学—流体力学]