of the ideal gas approximation for rotons, and a qualitative roton liquid model is proposed. The temperature dependence of viscosity of the liquid model is found to correspond with the observed viscosity above 1.8ยฐK, and with the discontinuity in the temperature derivative of viscosity at the lambda
Fluctuation theory of the critical kapitza resistance near the lambda point of liquid helium
โ Scribed by Richard A. Ferrell
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 195 KB
- Volume
- 165-166
- Category
- Article
- ISSN
- 0921-4526
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๐ SIMILAR VOLUMES
Heat capacity measurements of the liquid helium lambda transition in confined geometries have long been in disagreement with scaling theories of second order phase transitions. We present measurements of a 19 micron helium film which extend previous work to near macroscopic size. We find that the ne
Kapitza boundary resistance between copper and helium was measured above Th and found to be an order of magnitude smaller than the value previously proposed. Hence it is too small to explain the disagreement between thermal conductivity theory and some previous results.