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Cavitation inception occurs when the local pressure is less than the vapour pressure of the liquid. In effect the liquid locally boils to form a bubble of vapour. But producing the pressure gradients required to boil the liquid require a non-zero stress, or more precisely the viscous stress tensor has to be non-zero. In a superfluid the stress is always ...


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Answering on the third part of your question bubbles rely on the temporary breaking of a fluid state, so it would not be possible



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