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Physics Letters

Volume 20, Issue 5, 15 March 1966, Pages 474-475
Physics Letters

The dependence of the critical velocity of the superfluid on channel diameter and film thickness

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Abstract

The superfluid critical velocity in liquid helium varies with the fourth root of the diameter, ranging from a few Å up to a few cm. The quasi “critical” velocities often found are due to the onset of classical turbulence.

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