The transfer rate of helium film was measured in a container with typical dimensions of 1 cm. The film flow was induced thermally. Superimposed to the film flow was a rotation of the container. If a velocity difference between substrate and superfluid component were possible, the critical film flow rate would be expected to depend on the angular velocity of the rotation. No such dependence was found. We conclude that a sizable persistent current in a helium film in this geometry is not possible. This result is in agreement with measurements of Wang and Rudnick and in contradiction to those of Henkelet al.
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Wagner, F. Does a persistent current exist in a superfluid helium film?. J Low Temp Phys 13, 185–193 (1973). https://doi.org/10.1007/BF00654405
- Angular Velocity
- Magnetic Material
- Transfer Rate
- Typical Dimension