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Universal Onset of Quantum Turbulence in Oscillating Flows and Crossover to Steady Flows

Hänninen, R. ; Schoepe, Wilfried



Abstract

The critical velocity nu(c) for the onset of quantum turbulence in oscillatory flows of superfluid helium is universal and scales as nu(c) similar to root kappa omega, where kappa is the circulation quantum and omega is the oscillation frequency. This result can be derived from a general argument based on the "superfluid Reynolds number". Only the numerical prefactor may depend somewhat on the ...

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