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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.v32.i1-3.190
8 pages

The Stability of Boiling Regimes on a Rod as a Function of Local Temperature Perturbations

S. A. Kovalev
Institute of High Temperatures of the Russian Academy of Sciences, Moscow, Russia
S. V. Usatikou
Kuban' State Technological University, Krasnodar, Russia

RESUMO

We analyze the critical conditions for the initiation of the bubble boiling - film boiling replacement by a local site prescribed by a Π-like (finite) profile of temperature at the initial time instant. Using the direct Lyapunov method we obtained analytical expressions for the critical dimensions of the site and of the magnitude of perturbations in it for a one-dimensional problem. A satisfactory agreement of the obtained relations with numerical calculations and experimental data is shown.


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