Mechanism from particle compaction to fluidization of liquid–solid two-phase flow**Project supported by the National Natural Science Foundation of China (Grant No. 11772046) and the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 51705342).

Abstract

A new model of particle yield stress including cohesive strength is proposed, which considers the friction and cohesive strength between particles. A calculation method for the fluidization process of liquid–solid two-phase flow in compact packing state is given, and the simulation and experimental studies of fluidization process are carried out by taking the sand–water two-phase flow in the jet dredging system as an example, and the calculation method is verified.