Liquid hydrogen sloshing in superheated vessels under microgravity

We consider the influence of superheated walls on the axial sloshing motion of liquid hydrogen in an upright circular cylinder. The sloshing motion is induced by the capillary driven reorientation of the free surface after a step reduction of gravity. The step reduction is achieved in a drop tower facility which provides 4.7 s of compensated gravity conditions (Drop Tower Bremen). We conducted 15 experiments with two vessel radii of 26.2 mm and...