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Heat Transfer Research
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ISSN Imprimir: 1064-2285
ISSN En Línea: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v33.i5-6.60
6 pages

Calculation of Critical Heat Flux in Natural and Forced Convection Boiling

V. V. Budrik
Kriogenmash Stock Company, Balashikha, Moscow Region, Russia

SINOPSIS

A new model of the nucleate boiling crisis with a general approach is presented for different conditions of natural and forced convection. The mechanism of crisis is adequately described and the influence of all main factors on critical heat flux q and its intensification up to maximum allowed values are established within a wide range of regime and geometric parameters. The model is supported by satisfactory generalization of data obtained and reported for the critical heat flux q in pool boiling of cryogenic and non-cryogenic fluids in the free space and in smooth and rough channels as well as under the conditions of flow onto the rods and interaction of two-phase jets and vortex flows with the wall. The equations obtained for calculation are rather simple and have no more than one empirical constant that is physically substantiated and verified in generalization of data.


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