Viscosity of Liquid Helium below the λ-Point

@article{Kapitza1938ViscosityOL,
  title={Viscosity of Liquid Helium below the $\lambda$-Point},
  author={Piotr Leonidovich Kapitza},
  journal={Nature},
  year={1938},
  volume={141},
  pages={74-74}
}
THE abnormally high heat conductivity of helium II below the λ-point, as first observed by Keesom, suggested to me the possibility of an explanation in terms of convection currents. This explanation would require helium II to have an abnormally low viscosity; at present, the only viscosity measurements on liquid helium have been made in Toronto1, and showed that there is a drop in viscosity below the λ-point by a factor of 3 compared with liquid helium at normal pressure, and by a factor of 8… Expand
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References

SHOWING 1-4 OF 4 REFERENCES
The viscosity of liquid helium
It is a well-known fact that liquid helium changes from one form of liquid to another at a temperature of 2.19º K, under its own vapour pressure at that temperature. The liquid above this temperatureExpand
Heat Conduction in Liquid Helium
IT was found by Rollin1 and by Keesom and Keesom2 that liquid helium II shows an extra-ordinarily high heat conductivity, of the order of 190 cal./deg.cm.sec. We have measured the heat conductivityExpand
Viscosity of Helium I and Helium II
DETERMINATIONS have recently been made in the Cryogenic Laboratory at Toronto of the viscosity of liquid helium in its two states, helium I and helium II.