Particle image velocimetry studies of bubble growth and detachment by high speed photography

Matthew Stickland, William Dempster, Lee Lothian, Andrew Oldroyd

Research output: Chapter in Book/Report/Conference proceedingChapter

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Abstract

An understanding of bubble flows is important in the design of process equipment, particularly in the chemical and power industries. In vapour-liquid processes the mass and heat transfer between the phases is dominated by the liquid-vapour interface and is determined by the number, size and shape of the bubbles. For bubble flows these characteristics are often controlled by the generation mechanisms and, since bubble flows are often generated at an orifice, it is important to determine the controlling parameters which dictate how bubbles grow and detach. For bubbles growing at orifices the liquid displacement is an important feature and affects the pressure distribution acting on the bubble and the heat and mass transfer that may occur at the bubble interface. Therefore, in this study, the characteristics of the liquid velocity field are studied experimentally using Particle Image Velocimetry (PIV) during growth, detachment and translation of a bubble being generated at an orifice supplied with a constant mass flow rate of air. The process is transient and occurs over a period of approximately 50 msecs. In order to map the transient flow field a combination of high speed cine and cross correlation PIV image processing has been used to determine the liquid velocity vector field during the bubble growth process. The paper contains details of the PIV technique and presents several of the velocity vector maps calculated.
Original languageEnglish
Title of host publication22nd International Congress on High-Speed Photography and Photonics
EditorsDennis L. Paisley, Alan M. Frank
Place of PublicationBellingham, Washington
Number of pages7
Volume2869
Edition300
DOIs
Publication statusPublished - 28 May 1997

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume2869

Fingerprint

High speed photography
Velocity measurement
Orifices
Liquids
Bubbles (in fluids)
Vapors
Pressure distribution
Flow fields
Image processing
Mass transfer
Flow rate
Heat transfer
Air

Keywords

  • two phase flow
  • particle image velocimetry
  • bubbles
  • high speed photography

Cite this

Stickland, M., Dempster, W., Lothian, L., & Oldroyd, A. (1997). Particle image velocimetry studies of bubble growth and detachment by high speed photography. In D. L. Paisley, & A. M. Frank (Eds.), 22nd International Congress on High-Speed Photography and Photonics (300 ed., Vol. 2869). (Proceedings of SPIE; Vol. 2869). Bellingham, Washington. https://doi.org/10.1117/12.273421
Stickland, Matthew ; Dempster, William ; Lothian, Lee ; Oldroyd, Andrew. / Particle image velocimetry studies of bubble growth and detachment by high speed photography. 22nd International Congress on High-Speed Photography and Photonics. editor / Dennis L. Paisley ; Alan M. Frank. Vol. 2869 300. ed. Bellingham, Washington, 1997. (Proceedings of SPIE).
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Stickland, M, Dempster, W, Lothian, L & Oldroyd, A 1997, Particle image velocimetry studies of bubble growth and detachment by high speed photography. in DL Paisley & AM Frank (eds), 22nd International Congress on High-Speed Photography and Photonics. 300 edn, vol. 2869, Proceedings of SPIE, vol. 2869, Bellingham, Washington. https://doi.org/10.1117/12.273421

Particle image velocimetry studies of bubble growth and detachment by high speed photography. / Stickland, Matthew; Dempster, William; Lothian, Lee; Oldroyd, Andrew.

22nd International Congress on High-Speed Photography and Photonics. ed. / Dennis L. Paisley; Alan M. Frank. Vol. 2869 300. ed. Bellingham, Washington, 1997. (Proceedings of SPIE; Vol. 2869).

Research output: Chapter in Book/Report/Conference proceedingChapter

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N2 - An understanding of bubble flows is important in the design of process equipment, particularly in the chemical and power industries. In vapour-liquid processes the mass and heat transfer between the phases is dominated by the liquid-vapour interface and is determined by the number, size and shape of the bubbles. For bubble flows these characteristics are often controlled by the generation mechanisms and, since bubble flows are often generated at an orifice, it is important to determine the controlling parameters which dictate how bubbles grow and detach. For bubbles growing at orifices the liquid displacement is an important feature and affects the pressure distribution acting on the bubble and the heat and mass transfer that may occur at the bubble interface. Therefore, in this study, the characteristics of the liquid velocity field are studied experimentally using Particle Image Velocimetry (PIV) during growth, detachment and translation of a bubble being generated at an orifice supplied with a constant mass flow rate of air. The process is transient and occurs over a period of approximately 50 msecs. In order to map the transient flow field a combination of high speed cine and cross correlation PIV image processing has been used to determine the liquid velocity vector field during the bubble growth process. The paper contains details of the PIV technique and presents several of the velocity vector maps calculated.

AB - An understanding of bubble flows is important in the design of process equipment, particularly in the chemical and power industries. In vapour-liquid processes the mass and heat transfer between the phases is dominated by the liquid-vapour interface and is determined by the number, size and shape of the bubbles. For bubble flows these characteristics are often controlled by the generation mechanisms and, since bubble flows are often generated at an orifice, it is important to determine the controlling parameters which dictate how bubbles grow and detach. For bubbles growing at orifices the liquid displacement is an important feature and affects the pressure distribution acting on the bubble and the heat and mass transfer that may occur at the bubble interface. Therefore, in this study, the characteristics of the liquid velocity field are studied experimentally using Particle Image Velocimetry (PIV) during growth, detachment and translation of a bubble being generated at an orifice supplied with a constant mass flow rate of air. The process is transient and occurs over a period of approximately 50 msecs. In order to map the transient flow field a combination of high speed cine and cross correlation PIV image processing has been used to determine the liquid velocity vector field during the bubble growth process. The paper contains details of the PIV technique and presents several of the velocity vector maps calculated.

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Stickland M, Dempster W, Lothian L, Oldroyd A. Particle image velocimetry studies of bubble growth and detachment by high speed photography. In Paisley DL, Frank AM, editors, 22nd International Congress on High-Speed Photography and Photonics. 300 ed. Vol. 2869. Bellingham, Washington. 1997. (Proceedings of SPIE). https://doi.org/10.1117/12.273421