Abstract
Quantum fluids -such as superfluid helium- are recognized as a model-fluids for turbulence research because their dynamics result from the tangle of quantized vortex lines. We report a time-resolved measurements of the local vortex line density in a turbulent quantum flow, here 4He at 1.6 K. The sensor is a micromachined second sound resonator inserted across the flow. Over one decade of inertial range, the spectrum exhibits a -1.6 power law scaling, compatible with a -5/3 exponent.
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