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15 mins
Motion of quantum vortex lines near realistic rough boundaries
George Stagg, Nick Parker, Carlo F. Barenghi
Session: Superfluids 1
Session starts: Wednesday 26 August, 10:30
Presentation starts: 10:45
Room: Room E

George Stagg (Newcastle University)
Nick Parker (Newcastle University)
Carlo F. Barenghi (Newcastle University)

We numerically solve the three--dimensional, time--dependent Gross--Pitaevskii equation to model a superfluid flowing over a realistic rough boundary. Our model for the boundary is based on the atom--force microscope image of a NbTi vibrating wire used to generate turbulence in actual experiments. We find that near the boundary a dense region of quantum vortices is created, which forms a kind of `superfluid boundary layer'.