Mixed vOrticity-VElocity MEasurements in quaNtum Turbulence EuHIT Funded Project


Pantxo Diribarne
Sbt, Grenoble, France
Philippe Roche
CNRS, Grenoble, France
Emil Varga
Charles University in Prague, Prague, Czech Republic


Research Infrastructure
CEA Grenoble Helium Infrastructures, France
Facilities used
HeJet (HeJet)
Project leader
Simone Babuin
Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic


We have identified a facility – HeJet at Grenoble Helium Infrastructures – which would allow us to carry out turbulence measurements otherwise impossible in our own laboratories. Our motivation is to complement our existing global measurements of the density of quantized vortices in a steady turbulent superfluid helium flow, with new local measurements of velocity fluctuations available at HeJet with the hot-wire anemometry technique. This would allow us to significantly reduce experimental errors on the determination of a key property of turbulent superfluid 4He, its effective viscosity. This property is customarily a term of comparison between quantum turbulent experiments and theories, therefore to improve its firm experimental grounding is very important for the field.