Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 18    No. 2    April 2008

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Regularized determination of interfacial heat transfer coefficient during ZL102 solidification process
SUI Da-shan(隋大山), CUI Zhen-shan(崔振山)

National Die and Mould CAD Engineering Research Center, Shanghai Jiao Tong University,Shanghai 200030, China

Abstract:The interfacial heat transfer coefficient(IHTC) between the casting and the mould is essential to the numerical simulation as one of boundary conditions. A new inverse method was presented according to the Tikhonov regularization theory. A regularized functional was established and the regularization parameter was deduced. The functional was solved to determine the interfacial heat transfer coefficient by using the sensitivity coefficient and Newton-Raphson iteration method. The temperature measurement experiment was done to ZL102 sand mold casting, and the appropriate mathematical model of the IHTC was established. Moreover, the regularization method was used to determinate the IHTC. The results indicate that the regularization method is very efficient in overcoming the ill-posedness of the inverse heat conduction problem(IHCP), and ensuring the accuracy and stability of the solutions.


Key words: solidification; regularization; inverse problem; parameter determination; sensitivity coefficient; interfacial heat transfer coefficient

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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