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Freezing of water droplet due to evaporation: freezing of supercooled water activated by boiling phenomena.

[In Japanese. / En japonais.]

Author(s) : SATOH I., FUSHINOBU K., HASHIMOTO Y.

Type of article: Article

Summary

A water droplet, the diameter of which was 1-4 mm, was suspended in a test cell by fine metal wires and the cell was suddenly evacuated to a pressure lower than the triple-point pressure of water. The temperature of the droplet was measured by a thermocouple, and the cooling/freezing behaviour and the temperature profile of the droplet surface were captured using a video camera and an infrared thermo-camera, respectively. The water droplet is frozen within a few seconds through reaching of a remarkable supercooling state. When the initial temperature of the droplet is slightly higher than room temperature, boiling phenomena occur in the droplet simultaneously with the freezing due to evaporation. Under such conditions, it was shown that the degree of supercooling of the droplet is reduced by the bubbles generated in the droplet.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1999-2104
  • Languages: Japanese
  • Source: Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 15 - n. 3
  • Publication date: 1998
  • Document available for consultation in the library of the IIR headquarters only.

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