Effects of gravity level and tilt angle on oscillation of capillary rise

The dynamic evolution of interface in capillary plays an important role in spacecraft engineering and space fluid management. The process of interfacial oscillation in capillary has been well observed on the ground, which is related to factors such as capillary size, fluid properties and the wall’s wettability. However, in practical applications in space, the capillary rise and oscillation of the interface will be affected by the tilt angle and gravity level. For this reason, the process of the interface oscillation in a capillary tube is investigated in this work considering the effects of gravity level and the tilt angle of the tube. A mathematical model is built and numerical simulations are performed to obtain adequate details of the interface oscillation.