Etude des transferts thermiques en régime d'ébullition stagnante par nucléation dans la paroi chauffante

Abstract : The subject of this these is to show the role of the heat transfer in the wall during satured pool boiling. This effect, usually neglected in the modelisations of boiling, can explain some behaviours of the ebullition cycle and of the activities of nucleation sites. Il has been found the the ebullition cycle can be discribed by two periods : (1) during bubble growth, the wall temperature decraseses due to the evaporation of the microlayer at the base of the bubble; (2) initial superheat is reestablished mainly by radial heat conduction in the wall. It is the possible to account for the variations of the wall temperature displayed by liquid crystals put a the bottom of the heating surface, and of the influence of the contact angle on the heat transfer.


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Submitted on : Wednesday, December 21, 2011 - 4:47:44 PM
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Wladimir Bergez. Etude des transferts thermiques en régime d'ébullition stagnante par nucléation dans la paroi chauffante. Mechanics of the fluids [physics.class-ph]. Ecole nationale superieure de l'aeronautique et de l'espace, 1991. French. <tel-00654358>

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