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Crystal growth of a water ethanol mixture.

Number: pap. P05

Author(s) : KUWAHARA K., OHKUBO H.

Summary

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.

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Pages: 6 p.

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Details

  • Original title: Crystal growth of a water ethanol mixture.
  • Record ID : 30000600
  • Languages: English
  • Source: Measures to address climate change. 2010 International Symposium on Next-generation Air Conditioning and Refrigeration Technology: February 17-19, Tokyo, Japan.
  • Publication date: 2010/02/17

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