The Capacitance of Pristine Ice Crystals and Aggregate Snowflakes

Journal of the Atmospheric Sciences | January 1, 2008| | Copyright

ABSTRACT

A new method of accurately calculating the capacitance of realistic ice particles is described: such values are key to accurate estimates of deposition and evaporation (sublimation) rates in numerical weather models. The trajectories of diffusing water molecules are directly sampled, using random "walkers." By counting how many of these trajectories intersect the surface of the ice particle (which may be any shape) and how many escape outside a spherical boundary far from the particle, the capacitances of a number of model ice particle habits have been estimated, including hexagonal ...

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