Boiling after immersion of a superheated object in a quasi-adiabatic system and the bulk effect of heat transfer

After a comparatively superheated object is immersed in a liquid in a quasi-adiabatic system, a second vigorous boiling takes place spontaneously while the normal one is fading out. This phenomenon is caused by the transition of the boiling regime (i.e. the breaking of the Leidenfrost layer). Based...

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Bibliographic Details
Published in:Physica scripta 2013-02, Vol.87 (2), p.25603-6
Main Authors: Liu, Zi-Wen, Chen, Xiao-Yu, Liu, Jia-Hui, Su, Wei-Ning, Han, Min
Format: Article
Language:English
Subjects:
Boiling
Coefficients
Correlation
Heat transfer
Inhomogeneity
Intervals
Liquids
Mathematical models
Rectification
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Summary:After a comparatively superheated object is immersed in a liquid in a quasi-adiabatic system, a second vigorous boiling takes place spontaneously while the normal one is fading out. This phenomenon is caused by the transition of the boiling regime (i.e. the breaking of the Leidenfrost layer). Based on this, a semiquantitative model is developed to describe the thermal conduction behavior. Experimental correlations between the twice-boiling intervals and the influential parameters are used to test the validity of the theory. To simplify consideration of the bulk effect caused by the inhomogeneity of the temperature field, we propose a dimensionless rectification coefficient, the bulk effect rectification coefficient, related to the characteristic parameter ξ, that will be of value for engineering applications.
ISSN:0031-8949
1402-4896
DOI:10.1088/0031-8949/87/02/025603