| Download | - View final version: Fractal structures arising from interfacial instabilities in bio-oil atomization (PDF, 6.6 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1038/s41598-020-80059-w |
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| Author | Search for: Ghasemi, Abbas1; Search for: Yun, Sangsig1; Search for: Li, Xianguo |
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| Affiliation | - National Research Council of Canada. Aerospace
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| Funder | Search for: National Research Council of Canada; Search for: National Sciences and Engineering Research Council of Canada |
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| Format | Text, Article |
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| Physical description | 15 p. |
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| Abstract | The intriguing multi-scale fractal patterns ubiquitously observed in nature similarly emerge as fascinating structures in two-phase fluid flows of bio-oil breakup and atomization processes. High-resolution microscopy of the two-phase flows under 15 flow conditions (cases of different flow rates of the liquid and co-flowing air streams as well as different degrees of liquid preheating) reveal that the geometrical complexities evolve under the competing/combined action of the instability mechanisms such as Kelvin–Helmholtz, Rayleigh–Taylor and Rayleigh–Plateau leading into the transition from break-up to atomization. A thorough analysis of the higher order moments of statistics evaluated based on the probability density functions from 15,000 fractal dimension samples suggest that a single-value analysis is not sufficient to describe the complex reshaping mechanisms in two-phase flows. Consistently positive skewness of the statistics reveal the role of abrupt two-phase mechanisms such as liquid column rupture, ligament disintegration, liquid sheet bursting and droplet distortions in a hierarchical geometrical entanglement. Further, large kurtosis values at increased flow inertia are found associated with turbulence-induced intermittent geometrical reshaping. Interestingly, the proposed power-law correlation reveals that the global droplet size obtained from laser-diffraction measurements declines as the two-phase geometrical complexity increases. |
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| Publication date | 2021-01-11 |
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| Publisher | Nature Research |
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| Licence | |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Identifier | 80059 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 9c581f59-0523-4e0e-8bf0-3888c2bc475d |
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| Record created | 2022-10-13 |
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| Record modified | 2023-03-16 |
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