The equilibrium free surface of a liquid in a partly filled circular cylinder under the action of surface and gravitational forces is determined by the static contact-angle and liquid volume and may be expressed as a function of the bond number Bo.mehr...

In a microgravity environment liquid can be pumped and positioned by cohesion and adhesion forces. On earth this effect is covered by the hydrostatic pressure so it can only be observed in very fine tubes (so-called capillaries).mehr...

To provide gas free delivery of propellant at all times, special precautions have to be taken in spacecraft tank applications. mehr...

The Capillary Channel Flow project (CCF) is concerned with flow rate limitations in open capillary channels under low gravity conditions. An open capillary channel is a structure which establishes a liquid flow at low Bond numbers, i.e. when the capillary pressure caused by the surface tension forces dominates in comparison to the hydrostatic pressure induced by gravitational or residual accelerations. The cross section of the flow path is totally or partly confined by free surfaces.mehr...