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Updated: Jul 6, 2025

Extraction and Characterization of Surfactants from Atmospheric Aerosols
Published on: April 21, 2017
Lagrangian Supersaturation Fluctuations at the Cloud Edge
J Fries1, G Sardina2, G Svensson3,4
1Department of Physics, Gothenburg University, SE-41296 Gothenburg, Sweden.
Abstract:
Evaporation of cloud droplets accelerates when turbulence mixes dry air into the cloud, affecting droplet-size distributions in atmospheric clouds, combustion sprays, and jets of exhaled droplets. The challenge is to model local correlations between droplet numbers, sizes, and supersaturation, which determine supersaturation fluctuations along droplet paths (Lagrangian fluctuations). We derived a statistical model that accounts for these correlations. Its predictions are in quantitative agreement with results of direct numerical simulations, and explain the key mechanisms at play.
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