With an apparatus, designed originally for measuring the osmotic pressure of aHe-4He mixtures, measurements have been made of the isothermal flow of He I I through a narrow sht as a function of the applied pressure head and of the flow rate of He I I and of the superfluid component of aHe-\*He mixtu
Transport phenomena of liouid helium II in narrow slits
โ Scribed by C.S. Hung; B. Hunt; P. Winkel
- Publisher
- Elsevier Science
- Year
- 1952
- Weight
- 824 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0031-8914
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โฆ Synopsis
New measurements
have been carried out on the flow of matter and heat in liquid helium II through slits of 1 to 5 ,u slit widths, in order to study the equations of motion of the normal fluid and the superfluid as proposed by G o r t e r and M e 11 i n k 1). It is found, that, at high velocities, these equations can describe the observed phenomena very satisfactorily and values of the coefficient of the mutual friction A are calculated for different slit widths. However below a certain value of the superfluid velocity, no friction is observed and a combined hypothesis for the two velocity ranges is given.
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