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Author Amigó, M.L.; Herrera, T.; Neñer, L.; Peralta Gavensky, L.; Turco, F.; Luzuriaga, J. url  doi
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  Title A quantitative experiment on the fountain effect in superfluid helium Type Journal Article
  Year 2017 Publication European Journal of Physics Abbreviated Journal Eur. J. Phys.  
  Volume 38 Issue 5 Pages 055103  
  Keywords  
  Abstract Superfluid helium, a state of matter existing at low temperatures, shows many remarkable properties. One example is the so called fountain effect, where a heater can produce a jet of helium. This converts heat into mechanical motion; a machine with no moving parts, but working only below 2 K. Allen and Jones first demonstrated the effect in 1938, but their work was basically qualitative. We now present data of a quantitative version of the experiment. We have measured the heat supplied, the temperature and the height of the jet produced. We also develop equations, based on the two-fluid model of superfluid helium, that give a satisfactory fit to the data. The experiment has been performed by advanced undergraduate students in our home institution, and illustrates in a vivid way some of the striking properties of the superfluid state.  
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  ISSN 0143-0807 ISBN Medium  
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  Notes Approved no  
  Call Number BT @ pedrazp @ Serial 780  
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