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Numerical Modeling of Heat Transfer for Squeeze Casting of MMCs

용탕주조법을 이용한 금속복합재료 제조공정의 열전달 해석

  • 정창규 (포항공과대학교 대학원 기계공학과) ;
  • 정성욱 (포항공과대학교 대학원 기계공학과) ;
  • 남현욱 (포항공과대학교 첨단공학연구소) ;
  • 한경섭 (포항공과대학교 기계공학과)
  • Published : 2002.10.01

Abstract

A finite element model is developed for the process of squeeze casting of metal matrix composites (MMCs) in cylindrical molds. The fluid flow and the heat transit. are fundamental phenomena in squeeze casting. To describe heat transfer in the solidification of molten aluminum, the energy equation is written in terms of temperature and enthalpy are applied in an axisymmetric model which is similar to the experimental system. A one dimensional flow model simulates the transient metal flow. A direct iteration technique was used to solve the resulting nonlinear algebraic equations, using a computer program to calculate the enthalpy, temperature and fluid velocity. The cooling curves and temperature distribution during infiltration and solidification were calculated fer pure aluminum. Experimentally, the temperature was measured and recorded using thermocouple wire. The measured time-temperature data were compared with the calculated cooling curves. The resulting agreement shows that the finite element model can accurately estimate the solidification time and predict the cooling process.

Keywords

Numerical Modeling;Heat Transfer;Enthalpy Method

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