Liquid Metal Free Surface Motion Submerged in an AC Magnetic Field
Free surface motion of a liquid metal submerged in an alternating magnetic field has been examined. A copper vessel filled with a liquid gallium is set in a coil for the imposition of the alternating magnetic field. The alternating magnetic field penetrates into a liquid gallium only from an upper free surface because thickness of the copper vessel is larger than the electromagnetic skin layer of copper. Time variation of displacement of the standing wave loop excited on the free surface is detected by a laser level sensor. The standing wave was suppressed not only by intensification of the magnetic field magnitude but also increase of the magnetic field frequency.
Young Won Chang, Nack J. Kim and Chong Soo Lee
K. Iwai and S. Asai, "Liquid Metal Free Surface Motion Submerged in an AC Magnetic Field", Materials Science Forum, Vols. 561-565, pp. 1071-1074, 2007