The Transition From Nucleate Boiling Towards the Convection: Application to the Quenching of Metallic Massive Parts
- LTN-UMR 6607, Universite de Nantes, BP 50609 - 44306 Nantes cedex 3 (France)
- Saint-Gobain Research, BP 135, 93303 Aubervilliers Cedex (France)
In a recent study on thermal aspects of the quenching process, we developed an original device of measurement which allowed to update the competition between the heat transfer modes according to the quenching conditions and the quenched part size. One shows that, according to the range value of Biot number, the more resistive one part is, the more the boiling phases are relatively short. In order to provide relatively precise data for simulation of the quenching process in the case of strongly resistive parts from a thermal point of view, we undertook experiments on the cooling transition from nucleate boiling towards the convection. The obtained experimental results show that the temperature of transition from the nucleate boiling to the convection increases when the bath temperature decreases. We present the differences between the values of convection coefficient according to whether the bath is agitated or not. Experimental results relating are compared to some classical correlations.
- OSTI ID:
- 21056980
- Journal Information:
- AIP Conference Proceedings, Vol. 907, Issue 1; Conference: 10. ESAFORM conference on material forming, Zaragoza (Spain), 18-20 Apr 2007; Other Information: DOI: 10.1063/1.2729680; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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