Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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An analysis on the solidification process of alloy casting with a contact resistance

접촉 열저항을 고려한 합금주조의 응고과정 해석

  • Kim, W.S. (Dept. of Mechanical Engineering, Hanyang University) ;
  • Lee, K.S. (Dept. of Mechanical Engineering, Hanyang University) ;
  • Im, I.T. (Dept. of Mechanical Engineering, Hanyang University) ;
  • Kim, K.S.
  • 김우승 (한양대학교 기계공학과) ;
  • 이관수 (한양대학교 기계공학과) ;
  • 임익태 (한양대학교 대학원 기계공학과) ;
  • 김광선 (한국기술교육대학 기계공학과)
  • Published : 1997.01.01
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Abstract

The solidification process of Al 4.5%Cu alloy is numerically studied in the presence of contact resistance between mold and cast. Natural convection is considered in the liquid and mushy regions. The porosity approach is applied to the mushy zone modeling and linear variation of the solid fraction on the temperature is assumed. Results show that the mushy region is wider in the case with a contact resistance compared to the perfect contact condition. The temperature of the cast with a temporal variation in the contact heat transfer coefficient changes very rapidly in the early stage of the casting process compared to that with constant contact heat transfer coefficient.

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