Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 508899
Title How oil properties and layer thickness determine the entrainment of spilled surface oil
Author(s) Zeinstra-Helfrich, Marieke; Koops, Wierd; Murk, Albertinka J.
Source Marine Pollution Bulletin 110 (2016)1. - ISSN 0025-326X - p. 184 - 193.
DOI http://dx.doi.org/10.1016/j.marpolbul.2016.06.063
Department(s) Sub-department of Environmental Technology
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Chemical dispersion - Entrainment - Natural dispersion - Oil properties - Oil spill response
Abstract

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.

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