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Toward a physical characterization of raindrop collision outcome regimes

Publication ,  Journal Article
Testik, FY; Barros, AP; Bliven, LF
Published in: Journal of the Atmospheric Sciences
May 1, 2011

A comprehensive raindrop collision outcome regime diagram that delineates the physical conditions associated with the outcome regimes (i.e., bounce, coalescence, and different breakup types) of binary raindrop collisions is proposed. The proposed diagram builds on a theoretical regime diagram defined in the phase space of collision Weber numbers We and the drop diameter ratio p by including critical angle of impact considerations. In this study, the theoretical regime diagram is first evaluated against a comprehensive dataset for drop collision experiments representative of raindrop collisions in nature. Subsequently, the theoretical regime diagram is modified to explicitly describe the dominant regimes of raindrop interactions in (We, p) by delineating the physical conditions necessary for the occurrence of distinct types of collision-induced breakup (neck/filament, sheet, disk, and crown breakups) based on critical angle of impact consideration. Crown breakup is a subtype of disk breakup for lower collision kinetic energy that presents distinctive morphology. Finally, the experimental results are analyzed in the context of the comprehensive collision regime diagram, and conditional probabilities that can be used in the parameterization of breakup kernels in stochastic models of raindrop dynamics are provided. © 2011 American Meteorological Society.

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Published In

Journal of the Atmospheric Sciences

DOI

ISSN

0022-4928

Publication Date

May 1, 2011

Volume

68

Issue

5

Start / End Page

1097 / 1113

Related Subject Headings

  • Meteorology & Atmospheric Sciences
  • 3701 Atmospheric sciences
  • 0401 Atmospheric Sciences
 

Citation

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Testik, F. Y., Barros, A. P., & Bliven, L. F. (2011). Toward a physical characterization of raindrop collision outcome regimes. Journal of the Atmospheric Sciences, 68(5), 1097–1113. https://doi.org/10.1175/2010JAS3706.1
Testik, F. Y., A. P. Barros, and L. F. Bliven. “Toward a physical characterization of raindrop collision outcome regimes.” Journal of the Atmospheric Sciences 68, no. 5 (May 1, 2011): 1097–1113. https://doi.org/10.1175/2010JAS3706.1.
Testik FY, Barros AP, Bliven LF. Toward a physical characterization of raindrop collision outcome regimes. Journal of the Atmospheric Sciences. 2011 May 1;68(5):1097–113.
Testik, F. Y., et al. “Toward a physical characterization of raindrop collision outcome regimes.” Journal of the Atmospheric Sciences, vol. 68, no. 5, May 2011, pp. 1097–113. Scopus, doi:10.1175/2010JAS3706.1.
Testik FY, Barros AP, Bliven LF. Toward a physical characterization of raindrop collision outcome regimes. Journal of the Atmospheric Sciences. 2011 May 1;68(5):1097–1113.

Published In

Journal of the Atmospheric Sciences

DOI

ISSN

0022-4928

Publication Date

May 1, 2011

Volume

68

Issue

5

Start / End Page

1097 / 1113

Related Subject Headings

  • Meteorology & Atmospheric Sciences
  • 3701 Atmospheric sciences
  • 0401 Atmospheric Sciences