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SOLUTE POLARIZATION DURING PLANAR FREEZING OF AQUEOUS SALT SOLUTIONS.

Author(s) : KORBER C., SCHEIWE M. W., WOLLHOVER K.

Type of article: Article

Summary

FROZEN FOOD -PACKAGING -FILM -CARTON -SHRINKABLE PACKAGING -LAELLING -ECONOMICS AN ANALYSIS OF SOLUTE REDISTRIBUTION IN BINARY AQUEOUS SALT SOLUTIONS DURING UNIDIRECTIONAL FREEZING WITH A PLANAR SOLID-LIQUID INTERFACE IS PRESENTED. AN ADVANTAGE OF THE METHOD IS THE COMBINATION OF QUANTITATIVE MEASUREMENTS AND OBSERVATION ALLOWING A VISUAL CONTROL OF THE SHAPE OF THE ICE FRONT. PHOTOMETRIC SCANS OF CONCENTRATION PROFILES WERE RECORDED DURING ONE-DIMENSIONAL FREEZING WITH INTERFACE PROPAGATION RATES BETWEEN 1 AND 10 NANOM/SEC. THE < STEEPNESS > OF THE CONCENTRATION DISTRIBUTIONS INCREASED WITH BOTH TIME AND GROWTH VELOCITY. DURING THE INITIAL TRANSIENT, THE RESULTS AGREE WELL WITH A MATHEMATICAL MODEL DESCRIBING PURE MASS DIFFUSION AT CONSTANT ICE FRONT VELOCITY. INSTABILITIES OF THE PLANAR INTERFACE RESULTING IN DENDRITIC BREAKDOWN OCCURRED BEFORE EUTECTIC OR STEADY-STATE CONDITIONS WERE REACHED.

Details

  • Original title: SOLUTE POLARIZATION DURING PLANAR FREEZING OF AQUEOUS SALT SOLUTIONS.
  • Record ID : 1984-0881
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 26 - n. 8
  • Publication date: 1983/08

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