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Microbubble generation for PIV seeding


Venning, JA and De Vincentis, S and Pearce, BW and Brandner, PA, Microbubble generation for PIV seeding, Proceedings of the 20th Australasian Fluid Mechanics Conference (20AFMC), 5-8 December 2016, Perth, Australia, pp. 1-4. (2016) [Refereed Conference Paper]

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Copyright 2016 Australasian Fluid Mechanics Society

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A new device for microbubble generation using small-scale unsteady cavitation of supersaturated water is presented. Cavitation is created in a radial diffuser with a directed outlet for inlet/saturation pressures ranging from 300 to 1000 kPa. The diffuser is formed using an acrylic plate spaced 100 Ám above a 0.5 mm diameter outlet. Optical access is provided via the acrylic plate enabling investigation of the basic flow properties of the cavitation and microbubble trajectories using PIV. The size distribution and production rate of the generated microbubbles are measured using diffused-laser shadowgraphy and long-ranging microscopy within the emerging liquid jet. The size distribution of the microbubble population is suitable for PIV, with all bubbles produced being less than 25 Ám. Microbubble production rates in excess of 50 million bubbles per second are achievable. The variation of the generated microbubble population for various operating conditions is presented.

Item Details

Item Type:Refereed Conference Paper
Keywords:cavitation, microbubbles, flow visualisation, particle image velocimetry, experimental fluid mechanics
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Marine engineering
Objective Division:Defence
Objective Group:Defence
Objective Field:Emerging defence technologies
UTAS Author:Venning, JA (Dr James Venning)
UTAS Author:De Vincentis, S (Mr Sam De Vincentis)
UTAS Author:Pearce, BW (Dr Bryce Pearce)
UTAS Author:Brandner, PA (Professor Paul Brandner)
ID Code:113048
Year Published:2016
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2016-12-08
Last Modified:2018-05-23

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