Numerical study of flow and heat transfer of superfluid helium in capillary channels

K. Takamatsu, N. Fujimoto, Y. F. Rao, K. Fukuda

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


A modified two-fluid model is adopted to study flow and heat transfer of superfluid helium in a microchannel with a diameter as small as that of a superleak in a fountain effect pump. Variable properties of superfluid helium and energy dissipations due to the two-fluid mutual friction and the friction at the channel wall are fully taken into consideration. It is found that the normal fluid component flow is not trivial even in a channel with diameter of a micrometre, and that there exists an optimum diameter for the maximum mass flow rate. The flow of superfluid helium through a channel with different temperatures at the ends differs considerably from that of a Newtonian fluid. The strong dependence of the thermodynamic properties on temperature and pressure, as well as the internal-convection mechanism are found to be the causes of the unique flows.

Original languageEnglish
Pages (from-to)829-835
Number of pages7
Issue number12
Publication statusPublished - 1997

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)


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