Title

VISUAL STUDY OF THE FREEZING PROCESS OF A WATER DROPLET ON A HORIZONTAL COPPER PLATE

Document Type

Article

Publication Date

2022

Department

Department of Manufacturing and Mechanical Engineering Technology

Abstract

Freezing of droplets on cold surfaces can cause damage to equipment. To prevent the increase of ice, it is necessary to understand the freezing process of water droplets on the cold surface. In this study, based on the droplet shape analyzer, the freezing process of droplets is studied visually. The effects of the substrate temperature, ambient relative humidity, and volume of droplets on the freezing process were analyzed. It is found that the influence of ambient relative humidity and substrate temperature on the supercooling time is related to the degree of supercooling. With the decrease of the substrate temperature, there is a critical value of supercooling. When the substrate temperature is lower than the critical supercooling degree, the effect of substrate temperature on the supercooling time is weakened, and the ambient relative humidity has no effect on the supercooling time. The effect of droplet volume on supercooling time is nonmonotonic. With the increase of volume, the supercooling time decreases first and then increases. In the process of phase transformation, there is a positive correlation between the change of phase transformation time and the influencing factors.

Publication Title

Heat Transfer Research

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