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Frost heave in argon

Zhu1, Vilches, Dash

  • 1Department of Physics, University of Washington, Seattle, Washington 98105-1560, USA.

Physical Review Letters
|December 2, 2000
PubMed
Summary

Argon freezing in silica powder creates pure solid argon bands, similar to ice lens formation. A dynamical theory explains this via thermomolecular pressure-driven flow of melted films.

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Area of Science:

  • Materials Science
  • Thermodynamics
  • Geophysics

Background:

  • Ice lens formation in freezing soil is a complex phenomenon.
  • Understanding phase transitions in porous media is crucial for various scientific fields.

Purpose of the Study:

  • To investigate the mechanism of pure solid argon band formation during argon freezing in silica powder.
  • To elucidate the role of interfacially melted films in this process.

Main Methods:

  • Experimental observation of argon freezing in silica powder.
  • Development of a first-principles dynamical theory.

Main Results:

  • Argon freezing in silica powder generates pure solid argon bands, mirroring ice lens formation.
  • The theory identifies thermomolecular pressure-driven flow of interfacially melted films as the key mechanism.

Conclusions:

  • The study provides a mechanistic explanation for argon band formation, analogous to terrestrial ice lensing.
  • This research offers insights into phase transitions and fluid flow in porous materials.

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