期刊
MARINE POLLUTION BULLETIN
卷 110, 期 1, 页码 184-193出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2016.06.063
关键词
Entrainment; Natural dispersion; Chemical dispersion; Oil properties; Oil spill response
资金
- Gulf of Mexico Research Initiative/C-IMAGE II
- Wageningen UR, IPOP TripleP@Sea innovation programme [KB-14-007]
Viscosity plays an important role in dispersion of spilled surface oil, so does adding chemical dispersants. For seven different oil grades, entrainment rate and initial droplet size distribution were investigated using a plunging jet apparatus with coupled camera equipment and subsequent image analysis. We found that amount of oil entrained is proportional to layer thickness and largely independent of oil properties: A dispersant dose of 1:200 did not result in a significantly different entrainment rate compared to no dispersants. Oil viscosity had a minor to no influence on entrainment rate, until a certain threshold above which entrainment was impeded. The mean droplet size scales with the modified Weber number as described by Johansen. The obtained results can help improve dispersion algorithms in oil spill fate and transport models, to aid making an informed decision about application of dispersants. (C) 2016 Elsevier Ltd. All rights reserved.
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