Review of Numerical Simulation Research on Submersible Mixer for Sewage

Submersible mixer is the core machinery of sewage treatment, which has a profound effect on efficiency and performance submersible mixing system treatment. This paper summarizes scientific research results in recent years from four aspects: structure energy characteristics mixer, numerical simulation calculation method, flow field characteristics, factors affecting characteristics. The existing published literature indicates that for complicated parameters are special. Few experimental studies conducted, mostly calculations based clear water as medium. mixture model Euler–Euler method multiphase currently applied research. Many affect such installation (the location angle installation) impeller design (blade gap, hub-tip ratio, blade angle, etc.), all having significant impact performance. Meanwhile, development trends technology prospected, future directions further proposed: establishing more suitable Euler–Lagrange model; constructing with real fluid—solid-liquid two-phase medium; exploring influence various fluid; getting mechanism mixer; promoting realizing efficient stable operation submerged system.