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Microbubbles as proxies for oil spill delineation in field tests

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Wang, Y, Thanyamanta, W, Bulger, C and Hwang, J 2021 , 'Microbubbles as proxies for oil spill delineation in field tests' , Journal of Marine Science and Engineering, vol. 9, no. 2 , pp. 1-17 , doi: 10.3390/jmse9020126.

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Abstract

To overcome the environmental impacts of releasing oil into the ocean for testing acousticmethods in field experiments using autonomous underwater vehicles (AUVs), environmentallyfriendly gas bubble plumes with low rise velocities are proposed in this research to be used as proxiesfor oil. An experiment was conducted to test the performance of a centrifugal-type microbubble generator in generating microbubble plumes and their practicability to be used in field experiments. Sizesof bubbles were measured with a Laser In-Situ Scattering and Transmissometry sensor. Residencetime of bubble plumes was estimated by using a Ping360 sonar. Results from the experiment showedthat a larger number of small bubbles were found in deeper water as larger bubbles rose quickly tothe surface without staying in the water column. The residence time of the generated bubble plumesat the depth of 0.5 m was estimated to be over 5 min. The microbubble generator is planned to beapplied in future field experiments, as it is effective in producing relatively long-endurance plumesthat can be used as potential proxies for oil plumes in field trials of AUVs for delineating oil spills.

Item Type: Article
Authors/Creators:Wang, Y and Thanyamanta, W and Bulger, C and Hwang, J
Keywords: microbubbles, proxy, oil spill, sonar, size of bubbles, residence time
Journal or Publication Title: Journal of Marine Science and Engineering
Publisher: MDPI AG
ISSN: 2077-1312
DOI / ID Number: 10.3390/jmse9020126
Copyright Information:

Copyright 2021 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

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