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Characterization of microbubble generation in a confined turbulent jet

Citation

Barbaca, L and Russell, PS and Pearce, BW and Brandner, PA, Characterization of microbubble generation in a confined turbulent jet, Proceedings of the 22nd Australasian Fluid Mechanics Conference AFMC2020, 7-10 December 2020, Brisbane, QLD Australia, pp. 1-4. ISBN 9781742723419 (2020) [Refereed Conference Paper]


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Copyright Statement

Creative Commons Attribution-NonCommercial 3.0 International (CC BY-NC 3.0)

DOI: doi:10.14264/36f5f4c

Abstract

Microbubble populations generated via expansion of supersaturated water through an orifice into an expansion tube, in a socalled mini-tube type device, are characterized using shadowgraphy measurements. The effect of geometric scale is investigated by testing geometrically similar devices with the orifice diameters of 0.25 and 0.5 mm. To allow the detection of all bubbles passing through the imaged field-of-view, bubbly plume was discharged into a 0.5 mm thick Hele-Shaw cell, thus eliminating the need for depth-of-field correction. Saturation water was supplied at pressures between 200 and 1600 kPa. Both devices generated a poly-disperse bubble population, with dominant bubble size of about 10 Ám. Halving the orifice diameter resulted with approximately an order of magnitude lower bubble production rate for the same supersaturated water supply pressure.

Item Details

Item Type:Refereed Conference Paper
Keywords:microbubble, nuclei, cavitation, mini-tube
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ship and platform structures (incl. maritime hydrodynamics)
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in engineering
UTAS Author:Barbaca, L (Dr Luka Barbaca)
UTAS Author:Russell, PS (Mr Patrick Russell)
UTAS Author:Pearce, BW (Dr Bryce Pearce)
UTAS Author:Brandner, PA (Professor Paul Brandner)
ID Code:145822
Year Published:2020
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2021-08-06
Last Modified:2021-09-24
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