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The Effects of Forced Vibration on Two-Phase Flow in a Small Diameter Tube

[+] Author Affiliations
Akira Kariyasaki, Masazumi Kagawa

Fukuoka University, Fukuoka, Japan

Akiharu Ousaka

University of Tokushima, Tokushima, Japan

Tohru Fukano

Kyushu University, Fukuoka, Japan

Paper No. FEDSM2003-45380, pp. 1483-1487; 5 pages
  • ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
  • Volume 1: Fora, Parts A, B, C, and D
  • Honolulu, Hawaii, USA, July 6–10, 2003
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3696-7 | eISBN: 0-7918-3673-8
  • Copyright © 2003 by ASME


The effects of forced vibrations on the motion of air-water two-phase mixture were studied in 2.4mm I.D. horizontal tube over rather wide range of flow conditions (about 60 flows for lateral vibration, 4 flows and 1 stagnant mixture for longitudinal vibration). 13 different modes of sinusoidal vibration with 1–8mm amplitude and 1–7.7 Hz frequency were exerted on the test tube. Pressure drop, void fraction and flow pattern of the two-phase flow were compared to those of the flow without forced vibration. It was made clear that the lateral vibration exerted on the tube induced a self exciting fluctuation of the pressure drop for a specific flow condition and longitudinal vibration on the tube promoted the bubble coalescence.

Copyright © 2003 by ASME



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