EXPERIMENTAL INVESTIGATION OF LIQUID REORIENTATION IN SEMISPHERES UNDER MICROGRAVITY CONDITIONS

An experimental investigation of liquid reorientation in semispherical container by means of microgravity accelerations is conducted in a drop tower. The liquid used has zero-degree-static-contact angles on the semispherical container and is exposed to an initially concave interface in a zero-g environment before thrust. The study is conducted at two initialconditions, with and without an initial pulse. Liquid reorientation is observed by means of a high-speed camera. Reorientation flow velocity and time are measured. The results of this study indicate that liquid reorientate along the container wall and the reorientation time measured is consistent with theoretical estimation.