# 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…
612 Citations

### The Super-Fluidity of Liquid Helium II

THE study of the properties of liquid helium has been very fruitful in revealing unexpected phenomena—super-conductivity, abnormally high thermal conductivity, super-fluidity and others. Of these,

### The viscosity of liquid helium between 2 and 5° K

• Physics
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
• 1950
The viscosity of liquid helium has been measured with a flow method between 2 and 5° K . The coefficient of viscosity decreases with decreasing temperature over the whole range. A particularly

### Viscosity of Liquid Helium II

IN recent experiments on the flow of liquid helium II through very small openings, carried out by Allen and Misener1, and by Kapitza2, an upper limit to the viscosity was placed at 10−9 C.G.S. units,

### Preliminary Measurements on Grid Turbulence in Liquid 4He

• Physics
• 2008
Abstract A grid has been pulled through a column of liquid helium at speeds as high as 1 m/s and at temperatures as low as 90 mK. A 300 micrometer Ge thermometer with response time of less than 1 ms

### A Ponderomotive Effect associated with the Flow of Heat through Liquid Helium II

It has recently been suggested1,2 that liquid helium II shows a certain similarity with a Knudsen gas, the atoms moving with a very long mean free path. From the formula which is quite general (l is

### Experiments with Liquid Helium II

• Physics
Nature
• 1938
N. Körti, B. V. Rollin and F. Simon1 found that below the λ-point liquid helium slips over the surface of the tube lowered into it. They observed this phenomenon by increasing the flow of heat along

### Further Experiments on Liquid Helium II

• Physics
Nature
• 1938
IN a previous note1, we reported our investigation of the formation of a thin film of liquid helium II on the walls of a tube which is in contact with it. A very rough estimation of the thickness of

## References

SHOWING 1-4 OF 4 REFERENCES

### The viscosity of liquid helium

• Physics
Proceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences
• 1935
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 temperature

### Heat Conduction in Liquid Helium

• Physics
Nature
• 1937
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 conductivity

### 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.