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Effect of Macroscopic Parameters of Porous Material on Flow Characteristics for Superfluid Helium Thermomechanical Pump

  • Hirotaka Nakai
  • Nobuhiro Kimura
  • Tomiyoshi Haruyama
  • Masahide Murakami
  • Akira Yamamoto
Chapter
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 39)

Abstract

Flow characteristics of superfluid helium (He II) through a porous material for a thennomechanical pump (TMP) are not ideal in effect at a practical working point in employment such as cooling systems of detectors and superconducting magnets in space. If the He II flow through a porous element of a TMP were in the ideal state, there would be no dependence on geometry of the element. But the actual situation is not. In such non-ideal situations, some macroscopic parameters of the material as well as the geometry of a TMP element play important roles in a limitation of superfluid helium flow through a TMP element. Penneability of the porous element of a TMP is considered especially to discuss the flow characteristics of He II through a TMP element.

Keywords

Pore Diameter Porous Material Heat Input Mass Flow Rate Flow Characteristic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    M. Murakami and T. Hanyu, Hydrodynamic characteristics and limitation of He II flow through a porous element for a fountain effect pump, Adv. in Cryog. Eng. 37A: 123 (1992).Google Scholar
  2. 2.
    N. Kimura, H. Nakai, T. Haruyama, M. Murakami and A. Yamamoto, Study of a porous element for A thermomechanical pump in superfluid helium, Adv. in Cryog. Eng. 37A: 133 (1992).Google Scholar
  3. 3.
    R.B. Bird, W.E. Stewart and E.N. Lightfoot, Friction factors for packed columns, in: “Transport Phenomena,” John Wiley & Sons, New York (1960).Google Scholar

Copyright information

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • Hirotaka Nakai
    • 1
  • Nobuhiro Kimura
    • 1
  • Tomiyoshi Haruyama
    • 1
  • Masahide Murakami
    • 2
  • Akira Yamamoto
    • 1
  1. 1.National Laboratory for High Energy Physics(KEK)Tsukuba-shiJapan
  2. 2.Institute of Engineering MechanicsUniversity of TsukubaTsukuba-shiJapan

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