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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.v35.i56.120
5 pages

Heat and Mass Transfer under the Conditions of Rapid Heating

Pavel A. Pavlov
Institute of Thermophysics, Ural Branch of the Russian Academy of Sciences, Amundsen Street 107a, Ekaterinburg, 620016, Russia

SINOPSIS

In superheating liquid at a rate of 106−107 K/sec, an anomalously high sensitivity of a heat flux to test conditions has been revealed. The characteristic features of heat exchange are due to the steep temperature dependence of the rate of bubble formation. The first bubbles appear and coalesce on a relatively more heated section of the wall. Further the vapor front propagates along the heater following the motion of the isotherm corresponding to intense nucleation. The model explains the nonmonotonic dependence of a heat flux on time.