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Date of Publication:2022-10-04

Journal:高校化学工程学报

Volume:27

Issue:2

Page Number:205-209

ISSN No.:1003-9015

Abstract:In order to investigate how the magnetic field influences the supercooling of water and physiological saline, a test bench which can monitor magnetic field intensity and supercooling in real time was designed. 50 Hz alternating magnetic field with varying intensity from 0 G to 64 G was applied. 20 mL tap water or physiological saline was used as the test sample. Results show that the alternating magnetic field can, to some extent, reduce the possible lowest unfrozen temperature and increase supercooling. Besides, the supercooling increase of water and magnetic field intensity constitute a linear function relation with a supercooling increase about 2.06℃ under the largest magnetic field intensity (64 G), while the relation between the physiological saline and magnetic field intensity is in the form of three-order polynomial function with a supercooling increase about 1.73℃ under the largest magnetic field intensity (64 G). Compared with physiological saline, water has a larger supercooling increase under the same alternating magnetic field. The duration time of supercooling for water and physiological saline is prolonged, which evens the temperature within the test sample and delays the nucleation process. On the basis of the above phenomena, it was concluded that alternating magnetic field increases the supercooling of both water and physiological saline, and prolongs the supercooling duration time. This effect was thought to be related to the formation of water molecular hydrogen bonds.

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