Simulation of the Variations of the Temperature of Droplets in Freezing Precipitation

B. L. Smorodin, N. A. Kalinin, and D. V. Davydov

Carried out is the modeling of the process of temperature variations in a droplet and possible ice coating under synoptic conditions observed in the Perm krai on December 14, 2010 that are charac¬terized with the freezing rain fall at the temperature inversion in the atmospheric boundary layer. The phase transition on the moving water-ice interface, the curvature of the phase transition boundary, and variations of heat exchange on the boundary between the ice coating and atmosphere are taken into account. Computed is the thickness of the ice crust formed on fine droplets under conditions that provide the initiation of freezing precipitation. The evolution of the rate of the front of water crystallization on the droplet surface is defined and explained.