The Physical Effects of Bubbles and Cavitation in High Intensity ...
The Physical Effects of Bubbles and Cavitation in High Intensity ...
The Physical Effects of Bubbles and Cavitation in High Intensity ...
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<strong>Physical</strong> <strong>Effects</strong>: Inertial <strong>Cavitation</strong><br />
Sonolum<strong>in</strong>escence<br />
“light from sound”<br />
Inertial collapses <strong>of</strong><br />
acoustically forced<br />
bubbles <strong>in</strong> liquid<br />
Generic SL Cycle:<br />
Isothermal expansion<br />
Rapid adiabatic<br />
collapse<br />
Chemical dissociation<br />
Bubble Size<br />
• • • • •<br />
Acoustic Pressure<br />
Bubble Radius<br />
F = 20 kHz<br />
Res = 160 µm<br />
R 0 = 0.1 µm<br />
R Res<br />
Light <strong>Intensity</strong><br />
0 Time (µsec) 50<br />
11
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