Liquid velocity field measurements during bubble formation and detachment at an orifice

Research output: Contribution to conferencePaper

Abstract

This paper discusses the formation of gas bubbles at orifices with the purpose of experimentally investigating the influence of the surrounding liquid velocity field. The liquid velocity field measurements are established using PIV techniques utilising an Argon-ion laser to illuminate the fluorescent seeding. The images are recorded using high-speed digital video and the PIV results are obtained by cross correlation of the acquired images. Optical filters are used in an attempt to remove the glare from the bubble interface. The liquid velocity field was determined for the single bubble regime over a range of gas flowrates and orifice diameters of 2 mm and 6 mm. The investigation revealed a number of phenomena that are important to the growth of the bubble. These include liquid re-circulation due to necking, the extent of the influence of the preceding bubble and appearance of vortex rings generated by interface oscillations.
LanguageEnglish
Number of pages9
Publication statusPublished - 2001
Event9th International Conference on Laser Anemometry - Limerick, Ireland
Duration: 12 Sep 200114 Sep 2001

Conference

Conference9th International Conference on Laser Anemometry
CityLimerick, Ireland
Period12/09/0114/09/01

Fingerprint

orifices
detachment
bubbles
velocity distribution
liquids
particle image velocimetry
glare
vortex rings
optical filters
inoculation
gases
cross correlation
argon
high speed
oscillations
lasers
ions

Keywords

  • laser anemometry
  • liquid velocity

Cite this

Vidinha, T., Dempster, W. M., & Stickland, M. T. (2001). Liquid velocity field measurements during bubble formation and detachment at an orifice. Paper presented at 9th International Conference on Laser Anemometry, Limerick, Ireland, .
Vidinha, T. ; Dempster, W.M. ; Stickland, M.T. / Liquid velocity field measurements during bubble formation and detachment at an orifice. Paper presented at 9th International Conference on Laser Anemometry, Limerick, Ireland, .9 p.
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abstract = "This paper discusses the formation of gas bubbles at orifices with the purpose of experimentally investigating the influence of the surrounding liquid velocity field. The liquid velocity field measurements are established using PIV techniques utilising an Argon-ion laser to illuminate the fluorescent seeding. The images are recorded using high-speed digital video and the PIV results are obtained by cross correlation of the acquired images. Optical filters are used in an attempt to remove the glare from the bubble interface. The liquid velocity field was determined for the single bubble regime over a range of gas flowrates and orifice diameters of 2 mm and 6 mm. The investigation revealed a number of phenomena that are important to the growth of the bubble. These include liquid re-circulation due to necking, the extent of the influence of the preceding bubble and appearance of vortex rings generated by interface oscillations.",
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Vidinha, T, Dempster, WM & Stickland, MT 2001, 'Liquid velocity field measurements during bubble formation and detachment at an orifice' Paper presented at 9th International Conference on Laser Anemometry, Limerick, Ireland, 12/09/01 - 14/09/01, .

Liquid velocity field measurements during bubble formation and detachment at an orifice. / Vidinha, T.; Dempster, W.M.; Stickland, M.T.

2001. Paper presented at 9th International Conference on Laser Anemometry, Limerick, Ireland, .

Research output: Contribution to conferencePaper

TY - CONF

T1 - Liquid velocity field measurements during bubble formation and detachment at an orifice

AU - Vidinha, T.

AU - Dempster, W.M.

AU - Stickland, M.T.

N1 - Requires Template change to Chapter in Book/Report/Conference proceeding › Conference contribution: Proceedings of the 9th International Conference on Laser Anemometry

PY - 2001

Y1 - 2001

N2 - This paper discusses the formation of gas bubbles at orifices with the purpose of experimentally investigating the influence of the surrounding liquid velocity field. The liquid velocity field measurements are established using PIV techniques utilising an Argon-ion laser to illuminate the fluorescent seeding. The images are recorded using high-speed digital video and the PIV results are obtained by cross correlation of the acquired images. Optical filters are used in an attempt to remove the glare from the bubble interface. The liquid velocity field was determined for the single bubble regime over a range of gas flowrates and orifice diameters of 2 mm and 6 mm. The investigation revealed a number of phenomena that are important to the growth of the bubble. These include liquid re-circulation due to necking, the extent of the influence of the preceding bubble and appearance of vortex rings generated by interface oscillations.

AB - This paper discusses the formation of gas bubbles at orifices with the purpose of experimentally investigating the influence of the surrounding liquid velocity field. The liquid velocity field measurements are established using PIV techniques utilising an Argon-ion laser to illuminate the fluorescent seeding. The images are recorded using high-speed digital video and the PIV results are obtained by cross correlation of the acquired images. Optical filters are used in an attempt to remove the glare from the bubble interface. The liquid velocity field was determined for the single bubble regime over a range of gas flowrates and orifice diameters of 2 mm and 6 mm. The investigation revealed a number of phenomena that are important to the growth of the bubble. These include liquid re-circulation due to necking, the extent of the influence of the preceding bubble and appearance of vortex rings generated by interface oscillations.

KW - laser anemometry

KW - liquid velocity

M3 - Paper

ER -

Vidinha T, Dempster WM, Stickland MT. Liquid velocity field measurements during bubble formation and detachment at an orifice. 2001. Paper presented at 9th International Conference on Laser Anemometry, Limerick, Ireland, .