Motion of quantum vortex lines near realistic rough boundaries etc15 Tracking Number 37Presentation: Session: Superfluids 1 Room: Room E Session start: 10:30 Wed 26 Aug 2015 George Stagg george.stagg@newcastle.ac.uk Affifliation: Newcastle University Nick Parker nick.parker@newcastle.ac.uk Affifliation: Newcastle University Carlo F. Barenghi c.f.barenghi@ncl.ac.uk Affifliation: Newcastle University Topics: - Vortex dynamics and structure formation, - Turbulence in superfluids Abstract: 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'. |