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Heat Transfer Research
Fator do impacto: 0.404 FI de cinco anos: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimir: 1064-2285
ISSN On-line: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v38.i5.20
pages 399-406

1/f Fluctuations in Boiling Crisis

Andrey V. Vinogradov
Institute of Thermal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, 620016, Russian Federation
A. V. Reshetnikov
Institute of Thermophysics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
V. N. Skokov
Institute of Thermophysics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
Vladimir P. Koverda
Institute of Thermal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, 620016, Russian Federation

RESUMO

The dynamics of fluctuations in transition from nucleate to film boiling of water on a wire heater, in transition of droplets of water, pentane, and hexane to a spheroidal state on a hot surface, as well as at the discharge of superheated liquid jets from a highpressure vessel has been studied experimentally. It has been found that for a heat-transfer crisis during the change of boiling regimes and for intense pool boiling-up of the superheated liquid jet, the power spectrum of fluctuations has a lowfrequency component (flicker noise) that diverges under the 1/f law. This effect is attributed to non-equilibrium phase transitions in the system: the heattransfer crisis during transition from nucleate to film boiling and the flow crisis at the boiling-up of the superheated liquid jet.


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