Abstract
Capillary flow in microgravity in the vane-wall gap geometry in a cylindrical container is studied experimentally. The flow is of interest because it affects the performance of vane-type propellant management devices, in which the vane-wall gap geometry is common. Different flow regimes, previously reported for the capillary flow in cylinders of various cross-section geometries, are identified using the data obtained in the Purdue University 1.2-s drop tower. Effects of geometric parameters, contact angle, and liquid viscosity on the flow are studied, with emphasis on the Lucas-Washburn flow regime
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