The previous decade has witnessed a resurgence of activity surrounding capil-lary-dominated two-phase flow in microgravity that has resulted in several space station experiments including two iterations of the handheld Capillary Flow Experiments (CFE) and the remotely controlled two-phase capillary flow investigation Capillary Channel Flow (CCF). Approximately one thousand drop tower experiments have been performed at Portland State University in part in support of the ISS experiments, aiming at the development of capillary-driven geometric designs, and the production of new observations, some of which were not previously anticipated. In tandem with experimental efforts, an extended version of the Surface Evolver algorithm has been developed resulting in a more user friendly and capable tool called SE-FIT?. Driving the aforementioned work has been the continuous development of powerful analytical tools resulting in new solutions and a refined perspective on what are currently called 'compound capillary flows.' The synergistic feedback loop of low-cost quick-turnaround drop tower experimentation, productive & flexible numerical tools, and access to long duration microgravity aboard ISS has provided a unique opportunity to explore capillarity in ways that produce an important variety of applied and fundamental results, with emphasis on the former. The design of new systems with strongly capillary influenced processes can significantly improve system reliability with dramatic increases to technology readiness levels from evaluations that utilize the ISS as a test bed. Presented herein is a review of previous, current, and future work concerning fluids management aboard spacecraft as well as suggestions for incorporating the latest research into current systems with the goal of delivering a robust set of design tools to engineers in the field. It is expected that the culmination of results will enhance the reliability and performance of numerous spaceborne systems such as systems for oxygen supply, air revitalization, thermal management, water reclamation, medical fluids, and others, as well as mission-enabling propulsion systems that require liquid fuels/cryogen storage, liquid positioning and acquisition, liquid transfer, and mass gauging.
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