Effect of gravity on the pressure drop in gas-liquid two-phase flow

H. Ohta, R. Kataoka, S. Morioka, Y. Shinmoto

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


To clarify fundamentals of gravity effect on the behaviors in two-phase flow, experiments were conducted onboard aircraft. Annular flow of air-water mixture was realized independent of gravity level varying along a parabolic trajectory. Effect of gravity on the pressure drop was clarified systematically for vertical upward flow in a tube for different combinations of liquid and gas flow rates. Pressure drop becomes low when gravity is reduced, and the effect of gravity decreases with the increase of gas or liquid flow rate. The gravity effect was corresponded to the change of interfacial shear stress on the surface of annular liquid film, and a method to correlate the gravity effect on interfacial friction factor having direct influence on the pressure drop was introduced.

Original languageEnglish
Pages (from-to)83-90
Number of pages8
JournalEuropean Space Agency, (Special Publication) ESA SP
Issue number454 I
Publication statusPublished - 2000
Event1st International Symposium on Microgravity Research and Applications in Physical Sciences and Biotechnology - Sorrento, Italy
Duration: Sept 10 2000Sept 15 2000

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science


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