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SOLIDIFICATION OF AN ALLOY IN A CAVITY COOLED THROUGH ITS TOP SURFACE.

Author(s) : CAO W. Z., POULIKAKOS D.

Type of article: Article

Summary

AN EXPERIMENTAL STUDY ON THE PHENOMENON OF SOLIDIFICATION OF A BINARY ALLOY (WATER AND AMMONIUM CHLORIDE) IN A CAVITY COOLED THROUGH ITS TOP WALL IS REPORTED. THE GROWTH OF THE SOLID/MUSH INTERFACE AND THE MUSH/LIQUID INTERFACE WITH TIME AS WELL AS THE TEMPERATURE DISTRIBUTION IN THE CAVITY ARE DETERMINED IN THE COURSE OF THE STUDY FOR A HOST OF INITIAL CONCENTRATIONS. APPARENTLY, IN THE STUDY THE FLOW IN THE MUSH IS NOT SUFFICIENTLY STRONG TO RENDER CONVECTION THE MAIN HEAT TRANSFER MODE IN THE MUSH. IN THE LIQUID PHASE A BICELLULAR FLOW FIELD EXISTS. THE FLOW HAS AN EFFECT ON THE SHAPE OF THE MUSH/LIQUID INTERFACE. DOUBLE DIFFUSIVE CONVECTION TAKES PLACE IN THE LIQUID REGION BECAUSE AMMONIUM CHLORIDE IS CONSTANTLY RELEASED INTO THE LIQUID AS THE SOLIDIFICATION PROGRESSES DOWNWARDS, AFTER IT STARTED IN THE VICINITY OF THE TOP WALL.

Details

  • Original title: SOLIDIFICATION OF AN ALLOY IN A CAVITY COOLED THROUGH ITS TOP SURFACE.
  • Record ID : 1990-1835
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 33 - n. 3
  • Publication date: 1990/03

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