Carrolo, Gabriel Alexandre da CostaRibeiro, DanielaBarata, Jorge M MSilva, A. R. R.2019-12-112019-12-112019-01-06978-162410578-4http://hdl.handle.net/10400.6/7710Copyright © 2019 by Gabriel A. C. Carrolo; Daniela F. S. Ribeiro; Jorge M. M. Barata; André R. R. Silva. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission.The main breakup regimes are visualized and studied with the help of a high-speed camera and a continuous jet of air, provided by a wind tunnel, is used to transition the droplet into the various stages of secondary atomization. The use of Jet Fuel and Biofuel mixtures is the focal point of this study. All the known regimes are encountered and each transitional We is calculated. The variation of We due to Oh is described, in addition to the comparison between We number thresholds and correlations existent in the literature for each regime transition. The influence of these numbers on the dimensionless characterization of time and later the maximum cross stream diameter is shown. Finally, a correlation for the temporal evolution of the drops’ cross stream diameter for all regimes, assuming its deformation is not a linear function of time, is proposed.engAtomizationDropsDroplet DeformationBiofuelsBreakup regimesSecondary atomizationRegime transitionDrop breakupconference object10.2514/6.2019-0628