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Continuous Growth of Droplet Size Variance due to Condensation in Turbulent Clouds
Stockholm University, Faculty of Science, Department of Meteorology .
Stockholm University, Faculty of Science, Department of Meteorology .
Number of Authors: 4
2015 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 115, no 18, 184501Article in journal (Refereed) Published
Abstract [en]

We use a stochastic model and direct numerical simulation to study the impact of turbulence on cloud droplet growth by condensation. We show that the variance of the droplet size distribution increases in time as t(1/2), with growth rate proportional to the large-to-small turbulent scale separation and to the turbulence integral scales but independent of the mean turbulent dissipation. Direct numerical simulations confirm this result and produce realistically broad droplet size spectra over time intervals of 20 min, comparable with the time of rain formation.

Place, publisher, year, edition, pages
2015. Vol. 115, no 18, 184501
National Category
Meteorology and Atmospheric Sciences Fluid Mechanics and Acoustics Physical Sciences
URN: urn:nbn:se:su:diva-123516DOI: 10.1103/PhysRevLett.115.184501ISI: 000363787600010OAI: diva2:874999
Available from: 2015-11-30 Created: 2015-11-27 Last updated: 2015-11-30Bibliographically approved

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Sardina, GaetanoCaballero, Rodrigo
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