In this work, computational fluid dynamics (CFD) is used to study elbow erosion due to a gas–solid two-phase flow. In particular, the direct simulation Monte Carlo (DSMC) method is used to study the impact of inter-particle collision on the erosion behavior. The two-way coupled Euler–Lagrange method is used to solve the gas–solid flow, and the DSMC method is used to consider the collision behavior between particles. The effects of key factors, such as the particle concentration distribution and inter-particle collision, on the erosion ratio are evaluated and discussed. The effectiveness of the method is verified from experimental data. The results show that the inter-particle collision significantly influences the particle movement path and erosion ratio. When the inter-particle collision is considered, the maximum erosion position is offset. The erosion model proposed by Oka et al., who used the DSMC method, agrees best with the experimental data, and the average percentage error decreases from 39.2 to 27.4%.

在这项工作中，计算流体动力学（CFD）用于研究由于气固两相流引起的肘部腐蚀。特别是，直接模拟蒙特卡罗（DSMC）方法用于研究粒子间碰撞对冲蚀行为的影响。双向耦合的Euler–Lagrange方法用于求解气固流，而DSMC方法用于考虑粒子之间的碰撞行为。评估和讨论了诸如颗粒浓度分布和颗粒间碰撞等关键因素对侵蚀率的影响。实验数据验证了该方法的有效性。结果表明，颗粒间碰撞显着影响颗粒的运动路径和侵蚀率。当考虑粒子间碰撞时，最大腐蚀位置被抵消。