%0 Journal Article %1 ghasemi2021fractal %A Ghasemi, Abbas %A Yun, Sangsig %A Li, Xianguo %D 2021 %J Scientific Reports %K cdclrpr %N 1 %P 411 %R 10.1038/s41598-020-80059-w %T Fractal structures arising from interfacial instabilities in bio-oil atomization %U https://doi.org/10.1038/s41598-020-80059-w %V 11 %X 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.

@article{ghasemi2021fractal, 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.}, added-at = {2024-07-12T09:54:18.000+0200}, author = {Ghasemi, Abbas and Yun, Sangsig and Li, Xianguo}, biburl = {https://www.bibsonomy.org/bibtex/297576d01bbd83ca95994cab558c8c075/adisaurabh}, day = 11, description = {tmpshare > literature > atomsprays}, doi = {10.1038/s41598-020-80059-w}, interhash = {ce7b572b9450b93dfe8d323cf4c83e8c}, intrahash = {97576d01bbd83ca95994cab558c8c075}, issn = {2045-2322}, journal = {Scientific Reports}, keywords = {cdclrpr}, month = jan, number = 1, pages = 411, timestamp = {2024-07-12T09:54:18.000+0200}, title = {Fractal structures arising from interfacial instabilities in bio-oil atomization}, url = {https://doi.org/10.1038/s41598-020-80059-w}, volume = 11, year = 2021 }