On the dynamic contact angle in spontaneous capillary flow

摘要

Capillary spontaneous flow is an interesting solution to move fluids either in microgravity conditions, i.e. in space, in microfluidic systems. In both cases, gravity is negligible and capillarity is the dominant force. Spontaneous capillary flow onset as well as the dynamics of capillary flows have been recently documented in the literature for channels of different shapes, confined or open. However, the role of the dynamic contact angle is still unclear. This work aims at bringing a new light on the effect of the dynamic contact angle in the dynamics of capillary flows.