Upcoming Seminars

• Thermally and mechanically driven quantum turbulence in helium II
  Monday 28th May, 2pm, S1.20
  Andrew Baggaley (Newcastle University)

  Quantum turbulence can be generated in superfluid helium either thermally (by applying a heat flux, as in thermal cunterflow) or mechanically (by stirring the liquid). We model the superfluid vortex lines as reconnecting space curves with fixed circulation, and the driving normal fluid as a uniform flow (for thermal counterflow) and a synthetic turbulent flow (for mechanically driven turbulence). We compare the two forms of turbulence by computing their energy spectrum, distribution of curvature and amount of reconnections. Finally, we propose a method to experimentally detect the presence of superfluid vortex bundles.