Basic Study on Two-Phase Flow Characteristics of Slush Nitrogen in a Pipe

J. Ishimoto, R. Ohno, H. Yanagi, A. Machida, M. Ikeuchi, K. Hattori, A. Ito

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Citations (Scopus)


The fundamental two-phase flow characteristics of slush nitrogen in a pipe are numerically and experimentally investigated to develop effective cooling performance for long distance superconducting cables. First, the governing equations of the two-phase slush nitrogen flow based on the unsteady thermal nonequilibrium two-fluid model are presented and several flow characteristics are numerically calculated taking into account the effects of slush volume fraction, particle diameter, and duct shape. Furthermore, in experimental study, minute slush is generated by the slush atomization nozzle and the unsteady pressure and temperature distributions of two-phase slush nitrogen flow along the longitudinal direction of pipe are measured. According to the numerical and experimental results, it is found that the reduction of the pressure loss by using slush is possible in the case of long distance pipe lengths. Also, optimized thermal flow conditions for cryogenic two-phase slush nitrogen with practical use of latent heat of slush melting are predicted for the development of new type superconducting cooling systems.

Original languageEnglish
Title of host publicationAdvances in Cryogenic Engineering
Subtitle of host publicationTransactions of the Cryogenic Engineering Conference - CEC
EditorsJohn Pfotenhauer, Steven Van Sciver, Albert Zeller, Jonathan Demko, Christopher Rey, John G. Weisend II, John Barclay, Michael DiPirro, Quan-Sheng Shu, Peter Kittel, Edward Daly, John R. Hull, Jennifer Lock, Joseph Waynert, Susan Breon, James Maddocks, John Zbasnik, Patrick J. Kelley, Arkadiy Klebaner
PublisherAmerican Institute of Physics Inc.
Number of pages8
ISBN (Electronic)0735401861
Publication statusPublished - 2004 Jun 23
Event2003 Cryogenic Engineering Conference, CEC 2003 - Anchorage, United States
Duration: 2003 Sept 222003 Sept 26

Publication series

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


Conference2003 Cryogenic Engineering Conference, CEC 2003
Country/TerritoryUnited States


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