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Leidenfrost evaporation of liquid nitrogen droplets.

Author(s) : CHANDRA S., AZIZ S. D.

Type of article: Article

Summary

The evaporation of a single droplet of liquid nitrogen, levitated during film boiling above a solid, impervious surface, was studied experimentally. The droplet initial diameter (1.9 mm), surface temperature (about 20 deg C), ambient temperature (about 20 deg C), and ambient pressure (about 0.1 megapascal) were held constant. The principal parameters varied were the surface material (copper or glass), and roughness (0.35 to 50 micrometers). Measurements were made of the droplet diameter evolution and the surface temperature variation during droplet impact. Predictions from existing models of droplets in Leidenfrost evaporation agree well with measurements of the droplet evaporation rate.

Details

  • Original title: Leidenfrost evaporation of liquid nitrogen droplets.
  • Record ID : 1995-3452
  • Languages: English
  • Source: J. Heat Transf. - vol. 116 - n. 4
  • Publication date: 1994/11
  • Document available for consultation in the library of the IIR headquarters only.

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