The characteristics of coarse particle solid–liquid two-phase flow and wear properties in deep-sea multistage mining pumps

This paper designs flow-through components based on empirical formulas. It examines the solid–liquid two-phase flow characteristics of coarse particles in a novel deep-sea multistage mining pump using a Computational Fluid Dynamics-Discrete Element Method model. The flow characteristics and variation patterns of the cascade end faces between different stages under various particle sizes are investigated, along with the local flow and particle motion characteristics within the flow channels. Additionally, the effect of varying coarse particle sizes on the wear behavior of the flow-through components is examined. This study contributes to reducing wear during particle transport, improving the efficiency and stability of coarse particle transport, and supporting the development of solid–liquid two-phase flow theory for coarse particles.