Research on the Characteristics of the Solid–Liquid Two-Phase Flow Field of a Submersible Mixer Based on CFD-DEM

Submersible mixers are widely used in the sewage treatment process various fields, such as agriculture and industry. They mainly responsible for pushing flow mixing activated sludge particles a pool. Based on CFD-DEM coupling method under Euler–Lagrange framework, solid–liquid two-phase of submersible mixer was simulated this paper, motion characteristics distribution laws pool were studied axial, horizontal, lateral directions, respectively. An evaluation uniformity proposed to analyze velocity field, particles, particles. The results show that movement can be roughly divided into three stages: horizontal development stage, absorption–injection reflux-mixing which stage is main uniform whole field. Particle accumulation occurs dead zones Distribution axial direction has most homogeneous extent. Vortices generated near walls, causing This good guide engineering practice.