The Study of Graphite Particle-wall Impaction Process in High Temperature Gas-cooled Reactor Based on Finite Element Method (FEM)

The study of graphite particle-wall impaction is significantly important to estimate the deposition rate of the particle in high temperature gas-cooled reactor (HTGR). In this paper, the spherical particle-wall impaction is investigated with the help of ABAQUS based on finite element method (FEM). Only considering the perfectly elastic deformation, the simulation result agrees well with Hertz model. When taking the energy dissipation due to plastic deformation into accounted, the trends of restitution coefficients are consistent with experimental data but the values are underestimated. When the effective yielding strength is employed, the result is well predicted with experiments. The simulation results show the numerical method based on FEM is not only valid but also accurate, which provides a possible idea and method for non-spherical graphite particle-wall impaction in HTGR.