Pinning of Superfluid Vortices to Surfaces
- 21 July 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 45 (3) , 190-193
- https://doi.org/10.1103/physrevlett.45.190
Abstract
The effect of surface roughening on the onset of vortex motion in thermal counterflow in a rotating channel has been investigated. Smooth surfaced channels exhibit a critical counterflow velocity independent of surface characteristics. Rough surfaced channels exhibit a larger critical velocity, larger by just the amount necessary to bring the average vorticity at the surface parallel to the surface.Keywords
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