| Téléchargement | - Voir la version finale : Fractal structures arising from interfacial instabilities in bio-oil atomization (PDF, 6.6 Mio)
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| DOI | Trouver le DOI : https://doi.org/10.1038/s41598-020-80059-w |
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| Auteur | Rechercher : Ghasemi, Abbas1; Rechercher : Yun, Sangsig1; Rechercher : Li, Xianguo |
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| Affiliation | - Conseil national de recherches du Canada. Aérospatiale
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| Bailleur de fonds | Rechercher : National Research Council of Canada; Rechercher : National Sciences and Engineering Research Council of Canada |
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| Format | Texte, Article |
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| Description physique | 15 p. |
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| Résumé | 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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| Date de publication | 2021-01-11 |
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| Maison d’édition | Nature Research |
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| Licence | |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Identificateur | 80059 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 9c581f59-0523-4e0e-8bf0-3888c2bc475d |
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| Enregistrement créé | 2022-10-13 |
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| Enregistrement modifié | 2023-03-16 |
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