Wet fluidized beds of particles in small periodic domains are simulated using the CFD-DEM approach. A liquid bridge is formed upon particle-particle collisions, which then ruptures when the particle separation exceeds a critical distance. The simulations take into account both surface tension and viscous forces due to the liquid bridge. We perform a series of simulations based on different liquid bridge formation models: (1) the static bridge model of Shi and McCarthy, (2) a simple static version of the model of Wu et al., as well as (3) the full dynamic bridge model of Wu et al. We systematically compare the differences caused by different liquid bridge formation models, as well as their sensitivity to system parameters. Finally, we provide recommendations for which systems a dynamic liquid bridge model must be used, and for which application this appears to be less important. © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译：

---

液桥模型细节对湿流化床动力学的影响

使用CFD-DEM方法模拟了小的周期性域中的颗粒的湿流化床。粒子间的碰撞会形成液桥，然后当粒子间距超过临界距离时破裂。模拟考虑了由于液桥引起的表面张力和粘性力。我们基于不同的液桥形成模型执行一系列模拟：（1）Shi和McCarthy的静态桥模型，（2）Wu等人模型的简单静态版本，以及（3）完整的模型。吴等人的动态桥梁模型。我们系统地比较了由不同的液桥形成模型引起的差异，以及它们对系统参数的敏感性。最后，我们为必须使用动态液桥模型的系统提供了建议，对于哪个应用来说，它似乎不太重要。©2017美国化学工程师学会AIChE的Ĵ，2017年