The fluidization processes involving wet particles have been widely applied in many industries. A detailed understanding of wet particle collisions is critical. Existing studies have focused on collision between a particle and a plane covered by uniform liquid, while in practice the particle is commonly wetted by droplets with finite volume. In this study, we use Direct Numerical Simulation (DNS) to simulate and compare the “particle–particle” and “particle-plane” wet collisions. The model validation is performed for the “particle-plane” collisions. The wet restitution coefficients for the “particle-plane” collisions are significantly lower than those for the “particle–particle” collisions. The dissipation of kinetic energy increases with increasing droplet diameter and liquid viscosity. Furthermore, the proportion of energy dissipation is obtained by extracting the “force-distance” curve, which indicates that the pressure and contact forces are the dominant sources of kinetic energy dissipation.

涉及湿颗粒的流化过程已广泛应用于许多行业。详细了解湿粒子碰撞至关重要。现有的研究集中在粒子与被均匀液体覆盖的平面之间的碰撞，而在实践中，粒子通常被具有有限体积的液滴润湿。在本研究中，我们使用直接数值模拟 (DNS) 来模拟和比较“粒子-粒子”和“粒子-平面”湿碰撞。对“粒子-平面”碰撞执行模型验证。“粒子-平面”碰撞的湿恢复系数明显低于“粒子-粒子”碰撞的湿恢复系数。动能的耗散随着液滴直径和液体粘度的增加而增加。此外，