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Scaling of Microbubble Generation in a T-junction


Ailwood, A and Venning, JA and Barbaca, L and Russell, PS and Pearce, BW and Brandner, PA, Scaling of Microbubble Generation in a T-junction, Proceedings of the 23rd Australasian Fluid Mechanics Conference, 04-08 December 2022, Sydney, pp. AFMC2022-255. ISSN 2653-0597 (2022) [Refereed Conference Paper]

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Microbubble generation in a microfluidic T-junction was investigated in the context of artificial nuclei seeding of hydrodynamic facilities. Microbubble size distribution and production rate were investigated for a range of air, water and outlet pressures using high-speed shadowgraphy. The generator was found to produce a train of monodisperse bubbles approximately 100um in diameter across a range of operating conditions. The only exception to this being the cases with a large difference between the air and water supply pressures where bubble coalescence was prominent. An empirical scaling law depicting the dependence of bubble diameter on the operational conditions was developed by fitting all the data using least-squares regression. Bubble production frequency was found to exhibit a quadratic increase with an increase in the difference between the air supply and the outlet pressure. Production frequencies in the range 0 kHz to 3.5 kHz were observed across the range of investigated conditions. The reported work demonstrates the T-junction to be a robust device for monodisperse microbubble generation and a useful tool for experimental modelling of nucleation effects in hydrodynamic facilities.

Item Details

Item Type:Refereed Conference Paper
Keywords:microbubble generation, microfluidics, T-junction
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:Ailwood, A (Mr Aaron Ailwood)
UTAS Author:Venning, JA (Dr James Venning)
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:154806
Year Published:2022
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2023-01-09
Last Modified:2023-01-19

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