Numerical simulation study of particle self-rotation velocity in cyclone separator

Abstract

Abstract Cyclone separators are widely used in petrochemical, environmental protection and other fields. Taking the cyclone separators with single volute inlet as the research object, in order to study the particle self-rotation velocity and motion trajectory in its internal flow field, the Reynolds stress model (RSM) was used for the gas phase and the discrete phase model (DPM) was used for the solid phase. The tangential velocity distribution and the particle motion trajectory were obtained through numerical simulation, and the tangential velocity was used to derive the formula for the particle self-rotation velocity, and self-rotation velocity distribution obtained by writing expressions in Fluent. The results show that: in the internal flow field of the cyclone separator, the place with large velocity gradient will present a larger self-rotation velocity; when the particle size is 14.44 μm and the inlet air intake is 212 m3/h, the particles can be stably suspended in a certain region of the cylindrical section.