Numerical Analysis for Cooling and Freezing Processes with Subcooling

과냉각을 동반한 동결과정의 수치해석

  • 윤정인 (부경대학교 냉동공학과) ;
  • 김재돌 (부경대학교 냉동공학과) ;
  • 김성규 (한국해양대학교 운항시스템 공학부)
  • Published : 1996.11.01

Abstract

In this study, which focuses on ice storage, a fundamental study in cooling and solidification was performed, including the interesting phenomena of density inversion, supercooling and dendritic ice. A numerical study was performed for natural convection and ice formation considering existence of subcooling and dendritic ice were analyzed numerically by using finite difference method and boundary fixing method. In the mesh, the solid fraction was introduced with adding as a term to the energy conservation equation. A flow in the dendrite was modelled as a flow in a porous medium, and the momentum conservation equation was modified to incorporate resistance forces involved in flows through porous media. A numerical solution of the time dependencies of dendrite area and dense ice front was successfully obtained, and the numerical results were good agreement with experimental results. Based on this methodology, a discussion was made of phenomena and characteristics of cooling and freezing processes under various conditions.

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