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Evidence of a convective instability allowing warm water to freeze in less time than cold water.

Author(s) : MACIEJEWSKI P. K.

Type of article: Article

Summary

The experimental study explores the possibility that warm water may freeze in less time than cold water due to natural convection alone, i.e., in the absence of significant cooling by evaporation. This possibility is rooted in the following two hypotheses: the Rayleigh number associated with a sample of warm water may exceed a critical value above which the convective motions within the water sample may become turbulent and enhance the rate of convective cooling, and the inversion of the flow field that is expected to occur in the vicinity of maximum density, i.e., at 4 deg C, will occur at different points in the cooling process for identical samples of water at different levels of initial temperature.

Details

  • Original title: Evidence of a convective instability allowing warm water to freeze in less time than cold water.
  • Record ID : 1997-0163
  • Languages: English
  • Source: J. Heat Transf. - vol. 118 - n. 1
  • Publication date: 1996/02
  • Document available for consultation in the library of the IIR headquarters only.

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