Study on the Erosion Characteristics of Non-spherical Particles in Liquid-solid Two-phase Flow

Elbow erosion, defined as wall thinning due to the continuous interactions between solid particles and surface, is a common phenomenon in catalyst addition/withdrawal pipeline systems used residual oil hydrogenation units. This form of erosion can seriously affect reliable operation. The present paper describes construction realistic cylindrical using multi-sphere clump method computational fluid dynamics/discrete element model simulations study pipe walls under different inlet velocities particle aspect ratios. An optical shooting experiment carried out ensure accuracy calculation method, performance compared several existing drag models. results show that Haider & Levenspiel more accurate than others revealing actual flow. A higher velocity observed increase kinetic energy their spatial distribution. Specifically, when Stokes number greater 113.7, position maximum rate shifts from elbow’s outer inner wall. Cumulative contact introduced quantify two types particle-wall contacts. With growing ratio, proportion tangential gradually increases, which indicates sliding main mode. presented this provide reference for engineering calculations.