Journal of Fluid Mechanics

Effects of the non-equilibrium condensation of vapour on the pressure wave produced by the collapse of a bubble in a liquid

Shigeo  Fujikawa a1 and Teruaki  Akamatsu a1
a1 Department of Mechanical Engineering, Kyoto University, Kyoto

Article author query
fujikawa s   [Google Scholar] 
akamatsu t   [Google Scholar] 


Analytical and numerical analyses have been made of the physical behaviour of a collapsing bubble in a liquid. The mathematical formulation takes into account the effects of compressibility of the liquid, non-equilibrium condensation of the vapour, heat conduction and the temperature discontinuity at the phase interface. Numerical solutions for the collapse of the bubble are obtained beyond the time when the bubble reaches its minimum radius up to the stage when a pressure wave forms and propagates outward into the liquid. The numerical results indicate that evaporation and condensation strongly influence the dynamical behaviour of the bubble.

In addition, the propagation of the stress wave, both in a solid and a liquid, due to the collapse of the bubble has been observed by means of the dynamic photoelasticity. It is clearly demonstrated that the stress wave in a photoelastic specimen is caused by impact of the pressure wave radiated from the bubble.

(Published Online April 19 2006)
(Received December 22 1978)
(Revised July 2 1979)