基于 DNS 方法的湿颗粒间静态液桥形态模拟研究

Wet particles are widely applied in industrial processes such as energy, chemicals, petroleum, and pharmaceuticals. Due to the presence of liquid bridge structures between particles, liquid bridge structures significantly affect the mechanical properties of wet particles, leading to wet particle migration, aggregation, and adhesion. However, the physical mechanisms of this process are not clear. Therefore, this study focuses on static liquid bridges, employing the direct numerical simulation method to develop the VOF-IBM-DEM model. The simulation results are compared with those of others to validate the model’s correctness. The investigation explores the effects of different particle surface wettabilities and liquid contents on capillary forces and static liquid bridge structures, aiming to provide theoretical guidance for industrial applications. The results indicate that smaller contact angles and larger liquid contents result in larger neck radii for the liquid bridge. The magnitude of capillary forces is proportional to the area enclosed by the three-phase contact line, decreasing with increasing contact angles and decreasing liquid content.