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Continuous Growth of Droplet Size Variance due to Condensation in Turbulent Clouds
KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Mechanics of Industrial Processes. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, Centres, SeRC - Swedish e-Science Research Centre.
KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Mechanics of Industrial Processes. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, Centres, SeRC - Swedish e-Science Research Centre.ORCID iD: 0000-0002-4346-4732
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
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-177416DOI: 10.1103/PhysRevLett.115.184501ISI: 000363787600010PubMedID: 26565469Scopus ID: 2-s2.0-84946600029OAI: oai:DiVA.org:kth-177416DiVA: diva2:873657
Funder
Swedish e‐Science Research Center
Note

QC 20151124

Available from: 2015-11-24 Created: 2015-11-20 Last updated: 2017-12-01Bibliographically approved

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Brandt, Luca

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