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A Review of Natural Dispersion Models

2014· review· en· W1977637023 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenueInternational Oil Spill Conference Proceedings · 2014
Typereview
Languageen
FieldEnvironmental Science
TopicOil Spill Detection and Mitigation
Canadian institutionsSpinal Cord Injury Alberta
Fundersnot available
KeywordsDispersion (optics)Water columnRacing slickColumn (typography)MechanicsFlumeTurbulenceMathematical modelOil dropletEnvironmental sciencePetroleum engineeringGeologyMeteorologyMathematicsEngineeringPhysicsFlow (mathematics)StatisticsOil spillOceanographyGeometryOptics

Abstract

fetched live from OpenAlex

Natural dispersion occurs when fine droplets of oil are transferred into the water column by wave action or sea turbulence. Depending on oil conditions and the amount of sea energy available, natural dispersion can be insignificant or it can temporarily displace a portion of the oil. Current models predict the amount of oil entering the water column, but do not deal with their stability or how long these droplets stay in the water column. The most commonly-used model is by Delvigne, who carried out experiments in a flume. Delvigne measured the droplets entering the water column using a simplified procedure. These data were then converted to a model to predict the entry of droplets into the water column. Delvigne recommended procedures to calculate the resurfacing of the dispersed droplets but no models have implemented these. A review of the mathematics of this procedure show that the Delvigne model might be adjusted to be more unit consistent and to correctly incorporate oil viscosity. The other models used include the Audunson and Mackay models. These models are also reviewed. The Audunson model is simple and does not incorporate any inputs other than the wind speed. Further, the Audunson model predicts that most slicks will dissipate within a day or a few days. The Mackay model predicts little natural dispersion. Although the Mackay model incorporates a sea state function, the effect of this is not as great as in other models. Several issues have been noted about all natural dispersion models. These are: 1 In all cases natural dispersion models predicted the input of droplets into the water column and suggestions were made about predicting rise and resurfacing, but this important second part was never implemented by anyone,2 The natural dispersion predicted was measured as a temporary phenomenon - that is the instantaneous input of droplets into the water column. The persistence was not measured. The equation was designed to yield only the temporary transport in the water. Later workers assumed that the natural dispersion portion was permanently dispersed, and3 All models over-predict natural dispersion, especially in cases of low sea states.

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Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow), Insufficient payload (model declined to judge)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Other design · Consensus signal: none
GenreCandidate signal: Review · Consensus signal: Review
Teacher disagreement score0.970
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0010.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0020.001

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.032
GPT teacher head0.298
Teacher spread0.266 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it