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An experimental study on oil droplet size distribution in subsurface oil releases

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Abstract

Oil droplet size distribution (ODSD) plays a critical role in the rising velocity and transport of oil droplets in subsurface oil releases. In this paper, subsurface oil release experiments were conducted to study ODSD under different experimental conditions in a laboratory water tank observed by two high-speed cameras in March and April 2017. The correlation formulas Oh=10.2Re–1 and Oh=39.2Re–1 (Re represents Reynolds number and Oh represents Ohnesorge number) were established to distinguish the boundaries of the three instability regimes in dimensionless space based on the experimental results. The oil droplet sizes from the experimental data showed an excellent match to the Rosin–Rammler distribution function with determination coefficients ranging from 0.86 to 1.00 for Lvda 10-1 oil. This paper also explored the influence factors on and change rules of oil droplet size. The volume median diameter d50 decreased steadily with increasing jet velocity, and a sharp decrease occurred in the laminar-breakup regime. At Weber numbers (We) <100, the orifice diameter and oil viscosity appeared to have a large influence on the mean droplet diameter. At 100<We<1 000, the oil viscosity appeared to have a larger influence on the relative mean droplet diameter.

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Acknowledgements

The authors want to acknowledge the helpful guidance and advice from Yu Shun from The First Institute of Oceanography, State Oceanic Administration. They also acknowledge the constructive and valuable comments and suggestions of the reviewer and the editor.

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Authors and Affiliations

  1. Key Laboratory of Marine Environment and Ecology, Ministry of Education of China, Ocean University of China, Qingdao, 266100, China

    Jianwei Li & Huiwang Gao

  2. China Offshore Environmental Services Ltd., Tianjin, 300452, China

    Jianwei Li, Wei An & Yupeng Zhao

  3. The First Institute of Oceanography, State Oceanic Administration, Qingdao, 266061, China

    Yonggen Sun

Authors
  1. Jianwei Li
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  2. Wei An
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  3. Huiwang Gao
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  4. Yupeng Zhao
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  5. Yonggen Sun
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Corresponding authors

Correspondence to Wei An or Yonggen Sun.

Additional information

Foundation item: The National Key Research and Development Program of China under contract No. 2016YFC1402303.

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Li, J., An, W., Gao, H. et al. An experimental study on oil droplet size distribution in subsurface oil releases. Acta Oceanol. Sin. 37, 88–95 (2018). https://doi.org/10.1007/s13131-018-1258-5

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  • DOI: https://doi.org/10.1007/s13131-018-1258-5

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