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ISSN Druckformat: 1044-5110
ISSN Online: 1936-2684
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AN INVESTIGATION ON THE BREAKUP OF UNDERWATER BUOYANT OIL JETS: COMPUTATIONAL SIMULATIONS AND EXPERIMENTS
ABSTRAKT
We present experimental and computational results on the breakup of underwater buoyant oil jets and plumes at a wide range of Reynolds, Weber, and Richardson numbers and viscosity ratios. The results show three main jet breakup regimes: atomization, skirt-type, and pinch-off. The threshold Weber number for the atomization regime is around 100, which varies slightly with the jet Eotvos number. Furthermore, it is demonstrated that the correlation proposed by Masutani and Adams as the boundary for the atomization regime applies to our broader data set too. The experimental and computational results both suggest that in a buoyancy-driven jet breakup occurs only when the jet is accelerated to a point where the local Richardson number, defined based on properties at breakup, becomes less than 0.4, in which case the local Weber number is above 10. The computational results reveal the mechanisms leading to formation of small droplets around the perimeter of energetic jets and umbrella-shaped jet separations at less energetic cases. The time-averaged lateral expansion of the simulated jets, representing four different conditions, is presented as a function of the height along the jet. The computational results were obtained by using a GPU-accelerated MPI parallel two-phase flow solver, which provides acceleration factors between 3 to 6, compared to running on CPUs only.
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Murphy David W., Xue Xinzhi, Sampath Kaushik, Katz Joseph, Crude oil jets in crossflow: Effects of dispersant concentration on plume behavior, Journal of Geophysical Research: Oceans, 121, 6, 2016. Crossref
-
Wright Stuart F., Zadrazil Ivan, Markides Christos N., A review of solid–fluid selection options for optical-based measurements in single-phase liquid, two-phase liquid–liquid and multiphase solid–liquid flows, Experiments in Fluids, 58, 9, 2017. Crossref
-
Liu Ruixue, Daskiran Cosan, Cui Fangda, Ji Wen, Zhao Lin, Robinson Brian, King Thomas, Lee Kenneth, Boufadel Michel C., Experimental Investigation of Oil Droplet Size Distribution in Underwater Oil and Oil-Air Jet, Marine Technology Society Journal, 55, 5, 2021. Crossref
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Yu Guangzhe, Dong Jiannan, Foster Lynn M., Metaxas Athena E., Truskett Thomas M., Johnston Keith P., Breakup of Oil Jets into Droplets in Seawater with Environmentally Benign Nanoparticle and Surfactant Dispersants, Industrial & Engineering Chemistry Research, 54, 16, 2015. Crossref