Abstract
Fluidic devices for space experiments require an effective degasser to remove gas from gas-liquid two-phase flow. A method of using magnetic buoyancy force to remove bubbles from liquid has been studied. Magnetic buoyancy force (1 cm3) is shown by F= (1/2) (xc-xd grad H2. Xe, XL are the magnetic susceptibilities of gas and liquid (1 cm3) , respectively. Since XL - Xc and most liquid are diamagnetic, magnetic buoyancy force is considered to work toward a stronger magnetic field. In the experiment using a compact permanent magnet, N2 bubbles in pure water were found to move toward a stronger magnetic field in normal gravity. The present study suggests the possibility of an effective degasser in fluidic devices for space experiments.
