Although the importance of turbulence on rain formation was noted at least 60 years ago, progress has been very slow in quantifying the turbulence effects [1]. Adequate treatment of the turbulence effects on droplet growth represents a major gap in our understanding of cloud microphysical processes [2–7]. In this talk, we will discuss open issues in this subject, and report on an on-going, systematic effort to address various effects of turbulence on the growth of small cloud droplets to sizes for which the gravitational coagulation can operate effectively. We focus on the evolution in the size range from 10 μm to 100 μm for which the condensational growth is no longer an effective growth mechanism and gravitational coagulation alone is not sufficient to grow droplets at a rate typically observed. This size range involves a change of droplet inertial response time by roughly two orders of magnitude.
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ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
July 6–10, 2003
Honolulu, Hawaii, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-3696-7
PROCEEDINGS PAPER
Effects of Turbulence on the Coagulational Growth of Cloud Droplets: An Overview and Recent Results (Keynote)
Lian-Ping Wang,
Lian-Ping Wang
University of Delaware, Newark, DE
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Orlando Ayala,
Orlando Ayala
University of Delaware, Newark, DE
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Wojciech W. Grabowski
Wojciech W. Grabowski
National Center for Atmospheric Research, Boulder, CO
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Lian-Ping Wang
University of Delaware, Newark, DE
Orlando Ayala
University of Delaware, Newark, DE
Yan Xue
University of Delaware, Newark, DE
Wojciech W. Grabowski
National Center for Atmospheric Research, Boulder, CO
Paper No:
FEDSM2003-45716, pp. 361-362; 2 pages
Published Online:
February 4, 2009
Citation
Wang, L, Ayala, O, Xue, Y, & Grabowski, WW. "Effects of Turbulence on the Coagulational Growth of Cloud Droplets: An Overview and Recent Results (Keynote)." Proceedings of the ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. Volume 1: Fora, Parts A, B, C, and D. Honolulu, Hawaii, USA. July 6–10, 2003. pp. 361-362. ASME. https://doi.org/10.1115/FEDSM2003-45716
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