대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)
- 제21권1호
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- Pages.57-67
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- 1997
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- 1226-4881(pISSN)
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- 2288-5324(eISSN)
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접촉 열저항을 고려한 합금주조의 응고과정 해석
An analysis on the solidification process of alloy casting with a contact resistance
초록
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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