Cavitation is the formation of vapour cavities in a liquid – i.e.
small liquid-free zones ("bubbles" or "voids") – that are the
consequence of forces acting upon the liquid.
t usually occurs when a
liquid is subjected to rapid changes of pressure
that cause the formation of cavities where the pressure is relatively
low.
When subjected to higher pressure, the voids implode and can
generate an intense shock wave.
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