12th International Symposium on Flow Visualization

نویسندگان

  • P. M. Korczyk
  • A. Kowalewski
  • S. P. Malinowski
چکیده

Mixing of air containing small water droplets is investigated in the laboratory model to elucidate smallest scales of air entrainment and mixing in real clouds. Particle Image Velocimetry (PIV) is applied to evaluate turbulent characteristics of the flow field generated in the cloud chamber by buoyancy of the introduced mist. It permits to investigate dynamics of the process for scales from 0.07 mm to few centimeters, characteristic for a real cloud microphysics. Three velocity components retrieved in the vertical cross-section through the chamber interior indicate anisotropy of small-scale turbulent motions, with the preferred vertical direction. This result confirms earlier numerical studies, indicating, that evaporation of cloud droplets at the cloud-clear air interface may substantially influence the small-scale turbulence in clouds.

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تاریخ انتشار 2006