CFD analysis on two-phase pipe flow of slush nitrogen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

CFD analysis on the fundamental two-phase flow characteristics of slush nitrogen in a corrugated duct is conducted to develop effective cooling performance for superconducting cable. First, the governing equations of two-phase slush nitrogen flow based on the unsteady thermal non-equilibrium two-fluid model are constructed and several flow characteristics are numerically calculated taking into account the effects of the slush volume fraction, the thermodynamic behavior of slush, and the duct shape. Results of this research show that it is possible to reduce the pressure loss by using a two-phase slush flow under the high Reynolds number condition. It is also found that the reduction of the pressure loss is dominated not only by applying the appropriate size and volume fraction of slush particles, but also by the slush pumping effect that acts on the liquid-phase acceleration due to the momentum exchange between slush and liquid-phases. Furthermore, it is numerically predicted that with two-phase slush flow, the friction coefficient has a smaller value in the high Reynolds number region than that with single-phase flow.

Original languageEnglish
Title of host publicationADVANCES IN CRYOGENIC ENGINEERING
Subtitle of host publicationTransactions of the Cryogenic Engineering Conference, CEC, Volume 51A
Pages1017-1024
Number of pages8
DOIs
Publication statusPublished - 2006 Apr 27
EventADVANCES IN CRYOGENIC ENGINEERING: Transactions of the Cryogenic Engineering Conference, CEC - Keystone, CO, United States
Duration: 2005 Aug 292005 Sep 2

Publication series

NameAIP Conference Proceedings
Volume823 I
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherADVANCES IN CRYOGENIC ENGINEERING: Transactions of the Cryogenic Engineering Conference, CEC
CountryUnited States
CityKeystone, CO
Period05/8/2905/9/2

Keywords

  • Multiphase flow
  • Slush nitrogen
  • Superconducting cable

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation

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  • Cite this

    Ishimoto, J. (2006). CFD analysis on two-phase pipe flow of slush nitrogen. In ADVANCES IN CRYOGENIC ENGINEERING: Transactions of the Cryogenic Engineering Conference, CEC, Volume 51A (pp. 1017-1024). (AIP Conference Proceedings; Vol. 823 I). https://doi.org/10.1063/1.2202515