Calculation of heat transfer coefficients at the ingot surface during DC casting
Surface heat transfer coefficients representing the various regimes of water cooling during the Direct Chill (DC) casting of aluminum 3004 alloy ingots have been calculated using the inverse heat transfer technique. ProCAST, a commercial casting simulation package, which includes heat transfer, fluid flow, solidification, and inverse heat transfer, was used for this effort. Thermocouple data from an experimental casting run, and temperature-dependent thermophysical properties of the alloy were used in the calculation. The use of a structured vs. unstructured mesh was evaluated. The calculated effective heat transfer coefficient, which is a function of temperature and time, covers three water cooling regimes, i.e., convection, nucleate boiling, and film boiling, and the change of water flow rate with time.
- Research Organization:
- Albany Research Center (ARC), Albany, OR; University of Kentucky, Lexington, KY
- Sponsoring Organization:
- USDOE; SECAT (Lexington, KY)
- OSTI ID:
- 901684
- Report Number(s):
- DOE/ARC-2005-011
- Journal Information:
- Light Metals (Proceedings), Journal Name: Light Metals (Proceedings) Vol. 2005; ISSN 0147-0809
- Publisher:
- TMS (The Minerals, Metals and Materials Society), Warrendale, PA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALLOYS
ALUMINIUM
CASTING
CONVECTION
FILM BOILING
FLOW RATE
FLUID FLOW
HEAT TRANSFER
NUCLEATE BOILING
SIMULATION
SOLIDIFICATION
THERMOCOUPLES
WATER
aluminum base alloys
computer simulation
convection cooling
direct chill casting
finite element method
fluid flow
heat transfer coefficients
ingot casting
inverse heat transfer
mathematical models
solidification
thermophysical properties