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Microbubble production in a confined cavitating radial jet
Citation
Barbaca, L and Paul, RA and Pearce, BW and Brandner, PA, Microbubble production in a confined cavitating radial jet, Proceedings of the 11th International Symposium on Cavitation (CAV2021), 10-13 May 2021, Daejon, Korea (Virtual Conference), pp. 1-4. (2021) [Refereed Conference Paper]
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Abstract
Microbubble populations generated via rapid depressurization of supersaturated water in a
confined radial jet are characterized using shadowgraphy measurements. An experimental apparatus has
been utilized enabling independent control of the two main parameters controlling the flow: cavitation
number (𝜎inj) and Reynolds number (Re). Saturated water was supplied at pressures between 200 and
1600 kPa, and outlet pressures were varied between 10 and 300 kPa, resulting in 𝜎inj range 0.05 < 𝜎inj <
0.6 and 𝑅e range 10000 < Re < 25000. Microbubbles form through turbulent break-up and gaseous
diffusion in the cavity closure region. Generated populations have a ploy-disperse size distribution with
a dominant bubble size of about 5-10 μm with the majority of bubbles smaller than 20 μm. Total
production frequencies of up to 50 MHz are observed. The influence of Re on generated microbubble
populations is found to be more pronounced than that of 𝜎inj
Item Details
Item Type: | Refereed Conference Paper |
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Keywords: | microbubble, particle image velocimetry, cavitation |
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: | Paul, RA (Dr Rhys Paul) |
UTAS Author: | Pearce, BW (Dr Bryce Pearce) |
UTAS Author: | Brandner, PA (Professor Paul Brandner) |
ID Code: | 145825 |
Year Published: | 2021 |
Deposited By: | NC Maritime Engineering and Hydrodynamics |
Deposited On: | 2021-08-06 |
Last Modified: | 2021-09-24 |
Downloads: | 0 |
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