This leading term in the expansion for R is in error by only 10 to 30 per cent in the 

 range of easy experimental measurement. 



The results of the analysis for bubble growth in water at 1 atmosphere pressure 

 and 103°C are shown in Figs. 1-4. The radius-time behavior for several superheat 

 temperatures is shown in Fig. 5. Comparisons with experimental observations [4], are 

 shown in Figs. 6-8. 



if) 



lu 



007 



.00 6 



005 



004 



UJ 



O .003 



I 



002 



.0 01 



05 



.10 .15 20 



t — MILLISECONDS 



25 



.30 



.35 



40 



Figure 7. Theoretical radius vs time curve for the growth of a spherical vapor bubble in water af 

 1 atm external pressure, superheated to 103 C. The bubble is originally (at time t = 0) in 

 unstable equilibrium. The growth is initiated by the introduction of a uniform heat source in the 

 liquid (e.g. by irradiation), such as to produce a temperature rise in the liquid of 1 C in 100 sec. 

 The curve shows the slow initial rate of growth. 



303 



