Numerical simulation of droplet freezing process on surface of aluminum cold wall
To mitigate the harmful effects of liquid droplet freezing on the aluminum plate cold wall surface,numerical simulations were conducted by using Fluent software,analyzing the effects of cold wall surface temperature,air temperature,initial temperature of the droplet and droplet volume on the temperature field inside the droplet and the solid phase volume fraction.The results show that during the freezing process,both the internal temperature field and the solid-liquid interface exhibit concave symmetric distributions.When the cold wall surface temperature decreases from-10 ℃ to-20 ℃,the freezing time of the droplet decreases from 36.5 s to 14.3 s.When the air temperature decreases from-5 ℃ to-15℃,the freezing time of the droplet decreases from 31.0s to 29.7 s.When the initial temperature of the droplet increases from 2 ℃ to 14 ℃,the freezing time of the droplet increases from 21.2 s to 22.2 s.When the volume of the droplet increases from 5 μL to 20 μL,the freezing time of the droplet increases from 12.1 s to 30.8 s.When the cold wall surface temperature remains constant,the internal temperature field tends to be uniform after the complete freezing of the droplet,regardless of the initial temperature and volume of the droplet.The research results provide guidance for inhibiting the growth of frost layers on the cold wall surface of aluminum plates.
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