Stability and Dissipation of Laminar Vortex Flow in Superfluid He3B
Abstract
A central question in the dynamics of vortex lines in superfluids is dissipation on approaching the zero temperature limit T→0. From both NMR measurements and vortex filament calculations, we find that vortex flow remains laminar up to large Reynolds numbers Re_{α}̃10^{3} in a cylinder filled with He3B. This is different from viscous fluids and superfluid He4, where the corresponding responses are turbulent. In He3B, laminar vortex flow is possible in the bulk volume even in the presence of sizable perturbations from axial symmetry to below 0.2T_{c}. The laminar flow displays no excess dissipation beyond mutual friction, which vanishes in the T→0 limit, in contrast with turbulent vortex motion where dissipation has been earlier measured to approach a large Tindependent value at T≲0.2T_{c}.
 Publication:

Physical Review Letters
 Pub Date:
 September 2010
 DOI:
 10.1103/PhysRevLett.105.125301
 arXiv:
 arXiv:1005.0546
 Bibcode:
 2010PhRvL.105l5301E
 Keywords:

 67.30.hb;
 02.70.Pt;
 47.15.ki;
 67.30.he;
 Transport hydrodynamics and superflow;
 Boundaryintegral methods;
 Inviscid flows with vorticity;
 Textures and vortices;
 Condensed Matter  Other Condensed Matter;
 Nonlinear Sciences  Chaotic Dynamics
 EPrint:
 4 pages, 6 figures