Temperature variation and collapse time at the condensation of vapour bubble

The collapse of vapour bubble in subcooled liquid is studied in view of the fact that the predicted duration is delayed in comparison with the recorded graphs of size reduction. Deduced from well-known physical laws, a hypothesis was elaborated by which the delay is attached to neglecting the vapour temperature variation during the process, on the one hand, and disregarding the effect of the interfacial surface energy, on the other hand. The temperature rise of vapour bubble during its collapse, tending to and ending in the critical state, is explained, as well as the interrelation of the interfacial surface tension and latent heat is yielded. The hypothesis seems to agree well with the character of experimental results, and to be iustified by the studies on the mechanism of cavitation damage. Boänjakovic's heat balance equation and other functions are produced by means of dimensionless groups adequate for bubble.