Visualization study on frost suppression of cold surface of copper plate by magnetic field
In order to investigate the influence of weak magnetism on the freezing and frosting process of condensed droplets.By applying permanent magnets on both sides of the cold surface,the relationship between the magnetic field(0-70 mT)and the freezing time,size,thickness,and quality of the frost layer of the droplets was explored.The following findings were concluded based on the results.When the same working conditions are determined,with the increase of magnetic field intensity,the time of droplet freezing on the cold surface gradually extends.How-ever,with the increase of humidity to a certain extent,the relationship between droplet freezing time and magnetic field intensity is not linear.In addition,under different magnetic field intensi-ties,the sizes of frozen droplets are different.The growth rate of the frost layer slows down as the magnetic field intensity increases and the frost quality decreases during the frosting process.The above results show that a specific magnetic field intensity can suppress the freezing of droplets and the growth of the frost layer on the cold surface.However with the decrease of cold surface tem-perature and the increase of environmental humidity,the inhibition of the magnetic field on the freezing and frosting of droplets will weaken.
magnetic fieldcopper plate surfacedroplet freezingfrosting
万方数据
维普
