The movie shows:• •Schlieren images of a  60 micron radius spherical bubble of •air (ideal gas equation) in water (Tait equation of state), under a •lithotripter shock wave.
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After the lithotripter pulse impacts the bubble wall, it passes over the bubble, but an expansion wave is reflected from the bubble wall and propagates to the left.

 A weak air shock propagates through the bubble, from left to right, as a slower speed than does the lithotripter pulse in water.

After the lithotripter pulse has passed (left to right) over the bubble, the cavity collapses. When the liquid jet has passed through the bubble, it impacts the remote bubble wall and generates a blast wave.

 

  
The Free Lagrange code can incorporate solid target with real material properties, as shown on the next overhead:  
   
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© T G Leighton 2003