Numerical Computation of Shock Waves in a Spherical Cloud of Cavitation Bubbles
CaltechAUTHORS
View Archive InfoField  Value  
Title 
Numerical Computation of Shock Waves in a Spherical Cloud of Cavitation Bubbles


Creator 
Wang, YiChun
Brennen, Christopher E. 

Subject 
Caltech Library Services


Description 
The nonlinear dynamics of a spherical cloud of cavitation bubbles have been simulated numerically in order to learn more about the physical phenomena occurring in cloud cavitation. A finite cloud of nuclei is subject to a decrease in the ambient pressure which causes the cloud to cavitate. A subsequent pressure recovery then causes the cloud to collapse. This is typical of the transient behavior exhibited by a bubble cloud as it passes a body or the blade of a ship propeller. The simulations employ the fully nonlinear continuum mixture equations coupled with the RayleighPlesset equation for the dynamics of bubbles. A Lagrangian integral method is developed to solve this set of equations. It was found that, with strong bubble interaction effects, the collapse of the cloud is accompanied by the formation of an inward propagating bubbly shock wave, a large pressure pulse is produced when this shock passes the bubbles and causes them to collapse. The focusing of the shock at the center of the cloud produces a very large pressure pulse which radiates a substantial impulse to the far field and provides an explanation for the severe noise and damage potential in cloud cavitation.


Date 
199912


Type 
Article
PeerReviewed 

Format 
application/pdf


Identifier 
http://authors.library.caltech.edu/231/1/WNG189.pdf
Wang, YiChun and Brennen, Christopher E. (1999) Numerical Computation of Shock Waves in a Spherical Cloud of Cavitation Bubbles. Journal of Fluids Engineering, 121 (4). pp. 872880. ISSN 00982202. http://resolver.caltech.edu/CaltechAUTHORS:WNGjfe99 <http://resolver.caltech.edu/CaltechAUTHORS:WNGjfe99> 

Relation 
http://resolver.caltech.edu/CaltechAUTHORS:WNGjfe99
http://authors.library.caltech.edu/231/ 
