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Formation de cristaux dans un mélange eau-éthanol.

Crystal growth of a water ethanol mixture.

Numéro : pap. P05

Auteurs : KUWAHARA K., OHKUBO H.

Résumé

Water and ethanol exist together as a mixture in both liquid and solid phases. From this characteristic, along with recent advances in low-temperature technologies, water ethanol mixture has become important as environment-friendly coolants or thermal storage materials. In this study, in order to investigate the mechanisms of crystal formation and crystal growth in a water-ethanol mixture, the authors observe by microscope the crystal behaviours in a hemispherical minute droplet used for cooling a thin rod. It is found that equiaxed crystals form and then grow to hexagonal plane crystals, and these migrate toward the top of the droplet and arrange themselves in a honeycomb structure. Marangoni convection induced by the difference in concentration is considered as a way to move the equiaxed crystals.

Documents disponibles

Format PDF

Pages : 6 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Crystal growth of a water ethanol mixture.
  • Identifiant de la fiche : 30000600
  • Langues : Anglais
  • Source : Measures to address climate change. 2010 International Symposium on Next-generation Air Conditioning and Refrigeration Technology: February 17-19, Tokyo, Japan.
  • Date d'édition : 17/02/2010

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