Effects of physical properties of supercritical water on coarse graining of particle cluster (Open Access)--颗粒学报PARTICUOLOGY

Li, X., Wang, H., Li, Y., & Jin, H. (2023). Effects of physical properties of supercritical water on coarse graining of particle cluster. Particuology, 82, 166-178. https://doi.org/10.1016/j.partic.2023.02.004

Effects of physical properties of supercritical water on coarse graining of particle cluster (Open Access)

Xiaoyu Li, Huibo Wang, Yi Li, Hui Jin ^*

State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, China

10.1016/j.partic.2023.02.004

Volume 82, November 2023, Pages 166-178

Received 22 December 2022, Revised 7 February 2023, Accepted 13 February 2023, Available online 18 February 2023, Version of Record 24 February 2023.

E-mail: jinhui@mail.xjtu.edu.cn

Highlights

• Effects of physical properties on distributions of drag coefficients are revealed.

• Downstream particles are more strongly affected by the wake in supercritical water.

• Average drag characteristics of coarse-grained-particle are investigated.

• Dominant determination and modelling for the effects of physical properties.

Abstract

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.

Graphical abstract

Keywords

Supercritical water; Variations in physical properties; Fluidized bed; Coarse grain method; Particle drag

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