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Free boundary problems: modelling, experimental studies, binary eutectic mixtures.

Problèmes de frontières libres : modélisation, études expérimentales, mélanges eutectiques.

Author(s) : POSADO CANO R., RAMOS M., AGUIRRE-PUENTE J.

Summary

The authors study a generalization of the classic Stefan problem by assuming that phases could admit an extended range of transition. They present some theoretical results in plane geometry for freezing eutectic problems. Eutectic mixtures exhibit a definite zone of phase change delimited by isothermal planes at the liquidus and solidus temperatures. An equilibrium phase diagram shows that these binary mixtures are function of the initial solute concentration. The Dirichlet condition was considered with a constant wall temperature and the freezing zone was modelled by a uniform distribution of heat source which leads to a similarity solution of the problem. Finally, theoretical results are compared with experimental data obtained by solidification of an aqueous saline solution.

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Pages: 171-179

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Details

  • Original title: Problèmes de frontières libres : modélisation, études expérimentales, mélanges eutectiques.
  • Record ID : 2001-1078
  • Languages: French
  • Source: Permafrost and Actions of Natural or Artificial Cooling
  • Publication date: 1998/10/21
  • Document available for consultation in the library of the IIR headquarters only.

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