Numerical analysis of two-phase pipe flow of liquid helium using multi-fluid model

Jun Ishimoto, Mamoru Oike, Kenjiro Kamijo

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The two-dimensional characteristics of the vapor-liquid two-phase flow of liquid helium in a pipe are numerically investigated to realize the further development and high performance of new cryogenic engineering applications. First, the governing equations of the two-phase flow of liquid helium based on the unsteady thermal nonequilibrium multi-fluid model are presented and several flow characteristics are numerically calculated, taking into account the effect of superfluidity. Based on the numerical results, the twodimensional structure of the two-phase flow of liquid helium is shown in detail, and it is also found that the phase transition of the normal fluid to the superfluid and the generation of superfluid counterflow against normal fluid flow are conspicuous in the large gas phase volume fraction region where the liquid to gas phase change actively occurs. Furthermore, it is clarified that the mechanism of the He I to He II phase transition caused by the temperature decrease is due to the deprivation of latent heat for vaporization from the liquid phase. According to these theoretical results, the fundamental characteristics of the cryogenic two-phase flow are predicted. The numerical results obtained should contribute to the realization of advanced cryogenic industrial applications.

Original languageEnglish
Pages (from-to)811-818
Number of pages8
JournalJournal of Fluids Engineering, Transactions of the ASME
Issue number4
Publication statusPublished - 2001 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Mechanical Engineering


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