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Turbulence Heat and Mass Transfer 5. Proceedings of the International Symposium on Turbulence Heat and Mass Transfer
September, 25-29, 2006, Dubrovnik, Croatia

DOI: 10.1615/ICHMT.2006.TurbulHeatMassTransf


ISBN Print: 978-1-56700-229-4

ISSN: 2377-2816

Turbulence Effects on Cloud Droplet Collisions in Mesoscale Convective Clouds

pages 709-712
DOI: 10.1615/ICHMT.2006.TurbulHeatMassTransf.1540
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RESUMO

There is a growing consensus that the collision growth rate of cloud droplets can be increased by turbulence. We have performed numerical simulations of convective clouds to investigate the turbulence effects on cloud droplet collisions. We used the collision kernel model which we had developed to predict the collision frequency in cloud turbulence. Preliminary results of our simulations have shown that the particle collision growth is dramatically promoted by turbulence in orographic convective clouds. They have also shown that the total amount of rainfall over a mountain is significantly increased.

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