J024033 Effects of Alternating Magnetic Field on Supercooling of Water

Abstract

A method to actively enhancing supercooling is one of most promising techniques for cryopreservation. The object of this paper is to study the effects of alternating magnetic field on supercooling of water. In the experiments, water or 0.85wt% NaCl solution in a glass tube with thermocouple was cooled at constant cooling rate, with magnetic field. Two types of magnetic field; (a)static magnetic field and (b)alternating magnetic field, were tested by varying magnetic flux density and frequency. Regarding the case of static magnetic field, no supercooling enhancement was found. On the other hand, as for alternating magnetic field, weak enhancement of supercooling was found at magnetic flux of 0.2mT. Furthermore, for 0.85wt% NaCl solution, it was suggested that there is optimum value of frequency for enhancing supercooling degree.