LI Jianwei, AN Wei, GAO Huiwang, ZHAO Yupeng, SUN Yonggen. An experimental study on oil droplet size distribution in subsurface oil releases[J]. Acta Oceanologica Sinica, 2018, 37(11): 88-95. doi: 10.1007/s13131-018-1258-5
Citation: LI Jianwei, AN Wei, GAO Huiwang, ZHAO Yupeng, SUN Yonggen. An experimental study on oil droplet size distribution in subsurface oil releases[J]. Acta Oceanologica Sinica, 2018, 37(11): 88-95. doi: 10.1007/s13131-018-1258-5

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

doi: 10.1007/s13131-018-1258-5
  • Received Date: 2018-05-07
  • 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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