The collapse of vapor bubbles in a spatially non-uniform flow

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Abstract

Pressure gradients act differently on liquid particles and suspended bubbles and are, therefore, capable of inducing a relative motion between the phases even when no relative velocity initially exists. As a consequence of the enhanced heat transfer in the presence of convection, this fact may have a major impact on the evolution of a vapor bubble. The effect is particularly strong in the case of a collapsing bubble for which, due to the conservation of the system¿s impulse, the induced relative velocity tends to be magnified when the bubble volume shrinks. A practical application could be, for instance, the enhancement of the condensation rate of bubbles downstream of a heated region, thereby reducing the quality of a flowing liquid¿vapor mixture. A simple model of the process, in which the bubble is assumed to be spherical and the flow potential, is developed in the paper.
Original languageUndefined
Pages (from-to)3539-3550
Number of pages12
JournalInternational journal of heat and mass transfer
Volume43
Issue number19
DOIs
Publication statusPublished - 2000

Keywords

  • IR-24816
  • Boiling
  • METIS-129617
  • Vapor bubbles
  • Two phase flow

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