抄録
Unsteady deformations of liquid surface in a rectangular vessel with two parallel vanes were experimentally investigated to obtain the fundamental knowledge of capillary flow in intricate vane-wall geometry under microgravity conditions. In this study, we mainly investigated the viscous effect on the capillary flow and the gap effect at the vane-wall intersections. Experiments were carried out during the free fall time in a drop tower and the transient rise of the meniscus was observed by using a video camera. We confirmed that the Ohnesorge number was closely related with the viscous effect on the capillary flow and that the existence of gap at vane-wall intersection was expected to have much effect on the capillary rise of fluids with high viscosity. This may be due to the complexity of the geometrical configuration of the vessel.
