Cinematic two-phase PIV for bubbly flows

Thomas R. Oakley, Eric Loth, Ronald Adrian

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

7 Scopus citations

Abstract

The objective of this research was to develop a cinematic two-phase particle image velocimetry (PIV) system and evaluate its performance using a test flow of bubble dispersion in a two-stream, turbulent, planar free shear layer. It was desired to track detailed characteristics of individual bubbles through a temporally and spatially varying turbulent flowfield. The water shear layer under investigation has a velocity ratio of 0.23 and a Reynolds number of 26,200 based on velocity thickness and velocity difference. Air bubbles were injected directly into the shear layer through a single slender tube. The cinematic PIV was accomplished with an argon-ion laser, a rotating polygonal mirror and a 35 mm movie camera. The experimental data obtained with cinematic PIV yields a combined spatial and temporal evolution of the two-dimensional liquid velocity and spanwise vorticity fields. From the triple-pulsed bubble images in a sequence of PIV pictures, the bubble size and bubble trajectory can be accurately determined. From these two simultaneous data sets, the liquid velocity, acceleration, vorticity, and stress gradient at the instantaneous bubble location, and the bubble's velocity, acceleration and buoyancy force were obtained. Application of a bubble dynamics equation is then possible to allow further investigation of interphase momentum transport for modeling of multi-phase flows, which is the subject of future work.

Original languageEnglish (US)
Title of host publicationAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
EditorsD.E. Stock, Y. Tsuji, M.W. Reeks, E.E. Michaelides, M. Gautam
Place of PublicationNew York, NY, United States
PublisherASME
Pages123-130
Number of pages8
Volume209
StatePublished - 1995
Externally publishedYes
EventProceedings of the 1995 ASME/JSME Fluids Engineering and Laser Anemometry Conference and Exhibition - Hilton Head, SC, USA
Duration: Aug 13 1995Aug 18 1995

Other

OtherProceedings of the 1995 ASME/JSME Fluids Engineering and Laser Anemometry Conference and Exhibition
CityHilton Head, SC, USA
Period8/13/958/18/95

ASJC Scopus subject areas

  • Engineering(all)

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    Oakley, T. R., Loth, E., & Adrian, R. (1995). Cinematic two-phase PIV for bubbly flows. In D. E. Stock, Y. Tsuji, M. W. Reeks, E. E. Michaelides, & M. Gautam (Eds.), American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED (Vol. 209, pp. 123-130). ASME.