Pressure drop reduction of slush nitrogen in turbulent pipe flows

K. Ohira, M. Nozawa, J. Ishimoto, N. Koizumi, T. Kamiya

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

1 Citation (Scopus)


Slush fluid such as slush hydrogen and slush nitrogen is a two-phase (solid-liquid) single-component cryogenic fluid containing solid particles in liquid, and consequently its density and refrigerant capacity are greater than for liquid state fluid. Experimental tests were performed with slush nitrogen to obtain the frictional pressure drop flowing in a 15 mm internal diameter, 400 mm long, horizontal, stainless steel pipe. The primary objective of this study was to investigate the pressure drop reduction phenomenon with changes in velocity and solid fraction. From the experimental results, the pressure drop correlation between the friction factor and the Reynolds number was obtained and an empirical correlation was derived. Flow patterns for slush nitrogen inside a pipe and the behavior of solid particles were also observed using a high speed camera.

Original languageEnglish
Title of host publicationAdvances in Cryogenic Engineering - Transactions of the Cryogenic Engineering Conference - CEC
Number of pages8
Publication statusPublished - 2008
EventTransactions of the Cryogenic Engineering Conference, CEC 2007 - hattanooga, TN, United States
Duration: 2007 Jul 162007 Jul 20

Publication series

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


ConferenceTransactions of the Cryogenic Engineering Conference, CEC 2007
Country/TerritoryUnited States
Cityhattanooga, TN


  • Pressure drop reduction
  • Slush hydrogen
  • Slush nitrogen
  • Two-phase flow


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