Research on the influence of electrostatic field on the frosting characteristics of cold surfaces at low temperature
Based on a platform for visualizing the frosting process on cold surfaces at low-temperature,an experiment was carried out on the mechanism of action of electric field strength(1 kV/cm,2 kV/cm,3 kV/cm)in affecting the morphology,thickness,mass and density of frost crystals at different cold surface temperatures(-10.0 ℃,-25.0 ℃,-40.0 ℃,and-55.0 ℃).The results show that the electrostatic field can promote the growth of the main stem and weaken the growth of bran-ches of frost crystals.The branches will become thinner and thinner as the strength of the electric field increases.For a cold sur-face at-10.0 ℃,both 1 kV/cm and 2 kV/cm electrostatic fields show promotion of different frosting characteristics,while 3 kV/cm electrostatic field show inhibition.The thickness,mass and density of the frost layer for the cold surfaces at the other low temperatures all decrease with increasing electric field strength.The lower the surface temperature,the more significant the effect of the electric field is.It is confirmed that electric field with an appropriate intensity can inhibit the rate of frost formation on the cold surfaces at low temperatures.
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