Po-P, 



Gas Nuclei Trajectories and Cavitation Inception 

 y = surface tension of liquid 



= vapor cavitation number. 



pUV2 



Figure 1 shows the relation between the bubble size and the pressure given by 

 Eq. (1). 



d/dc 



Fig. 1 - The quasi-steady growth of spherical 

 gas bubbles in a liquid 



Consider a bubble which is moving in a flow field; its size will vary due to 

 the pressure variation from place to place along its path. In order to find the 

 bubble size at a specific point P(x,y) in the flow field, Eq. (1) can be rewritten 

 as 



8/W 



CT.. + C 



, 



(2) 



where 



K_ P - Pq 



165 



