Collapse of a hot vapor bubble in subcooled liquid

Le T, C.; Melikhov, V.I.; Melikhov, O.I.; Yakush, S.E.

Авторы: Le T Chung, Melikhov V.I., Melikhov O.I., Yakush S.E.
Журнал: Journal of Physics: Conference Series
Том: 1652
Год издания: 2020
Издательство: IOP Publishing
Местоположение издательства: [Bristol, UK], England
Первая страница: 012018
Последняя страница: 012018
DOI: 10.1088/1742-6596/1652/1/012018
Аннотация: Numerical simulations are performed for a spherical bubble containing hot vapor insubcooled water. Unlike conventional cavitation problems, the initial pressure in the bubble andsurrounding liquid are equal to each other. The physical mechanism for the appearance ofpressure difference driving the bubble collapse is rapid cooling and condensation of vapor in thebubble. A model for the fluid dynamics and thermal processes in the bubble and in the liquid ispresented. The governing equations are solved numerically in the transformed coordinates wherethe bubble size remains constant, with the Rayleigh-Plesset equation describing the timeevolution of bubble radius. The effect of the initial superheat of vapor in the bubble with respectto the saturation temperature is studied. The bubble collapse of hot vapor is compared with anidealized case, resembling collapse of a cavitation bubble. Estimates for the kinetic energy ofliquid gained in the course of bubble collapse are obtained. The results are applicable to theevaluation of the perturbations to spreading melt surface due to interaction with the unstablewater-vapor interface, and to the evaluation of the premixing zone in the stratified steamexplosions.
Добавил в систему: Якуш Сергей Евгеньевич

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