Back to Search
Start Over
Oil Droplet Dispersion under a Deep-Water Plunging Breaker: Experimental Measurement and Numerical Modeling
- Source :
- Journal of Marine Science and Engineering, Volume 8, Issue 4, Journal of Marine Science and Engineering, Vol 8, Iss 4, p 230 (2020)
- Publication Year :
- 2020
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2020.
-
Abstract
- Knowledge of the droplet size distribution (DSD) of spilled oil is essential for the accurate prediction of oil transport, dissolution, and biodegradation. Breaking waves play important roles in oil droplet formation in oceanic environments. To understand the effects of breaking waves on oil DSD, oil spill experiments were designed and performed in a large-scale wave tank. A plunging breaker with a height of about 0.4 m was produced using the dispersive focusing method within the tank. Oil placed within the breaker resulted in a DSD that was measured using a shadowgraph camera and found to fit a Gaussian distribution (&micro<br />= 1.2 mm, &sigma<br />2 = 0.29 mm2). For droplets smaller than 1500 &micro<br />m, the number-based DSD matched the DS1988 correlation [1], which gives N(d) ~ d-2.3, but this was N(d) ~ d-9.7 for droplets larger than 1500 &micro<br />m. An order of magnitude investigation revealed that a Gaussian volume-based DSD results in a number-based DSD that may be approximated by d-b (with b &asymp<br />2) for small diameters (relative to the mean), which explains the occurrence of the DS1988 correlation. With the measured wave hydrodynamics, the VDROP model was adopted to simulate the DSD, which closely matched the observed DSD. The present results reduce the empiricism of the DS1988 correlation.
- Subjects :
- Materials science
010504 meteorology & atmospheric sciences
shadowgraph camera
Gaussian
droplet size distribution
plunging breaker
Ocean Engineering
010501 environmental sciences
01 natural sciences
symbols.namesake
lcsh:Oceanography
lcsh:VM1-989
VDROP model
Shadowgraph
dispersive focusing method
Wave tank
lcsh:GC1-1581
Dispersion (water waves)
0105 earth and related environmental sciences
Water Science and Technology
Civil and Structural Engineering
oil dispersion
Breaking wave
lcsh:Naval architecture. Shipbuilding. Marine engineering
Mechanics
ImageJ
Volume (thermodynamics)
Oil droplet
symbols
Order of magnitude
Subjects
Details
- Language :
- English
- ISSN :
- 20771312
- Database :
- OpenAIRE
- Journal :
- Journal of Marine Science and Engineering
- Accession number :
- edsair.doi.dedup.....48525b69f36adde855cf27a6e1874ccc
- Full Text :
- https://doi.org/10.3390/jmse8040230