Abstract
Results of numerical simulation of the growth of a vapor bubble in a nonuniformly superheated liquid are presented. The effect of the nonuniformity of the temperature on the growth dynamics of the vapor bubble is studied. The simulation conditions corresponded to saturation and underheating of the liquid in the volume to the saturation temperature. The nonuniformity of the temperature results in a significant decrease of the bubble growth rate at the thickness of the superheating layer, which is comparable with the radius of the separation bubble. Numerical results are compared with the experimental data for the growth of a vapor bubble near a cylindrical heater. The numerical results for strong superheating agree well with the experimental data at the initial stage of the vapor bubble growth. The measured values of the bubble radius exceed those calculated in the presence of vaporization fronts. This excess can be explained by the presence of an additional supply of vapor to the central bubble from the vaporization front.
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Aktershev, S.P., Ovchinnikov, V.V. Dynamics of a vapor bubble in a nonuniformly superheated fluid at high superheat values. J. Engin. Thermophys. 16, 236–243 (2007). https://doi.org/10.1134/S1810232807040042
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DOI: https://doi.org/10.1134/S1810232807040042