[Bdew8556]

Greetings all!

I'm trying to model wind driven rain incident on building fascades.

Basically I can find equations showing how droplet size and terminal velocity are related, and also how rain drop size is distributed for a given amount of rainfall around a given "equivovolume" diameter.

the problem is how to I relate measurable environmental conditions such as atmospheric pressure and altitude to a "mean" or median droplet size?

For example we know that the "mean" (I want to be careful statistically) is around 2-4 mm and not 6-8mm? we can do experiments but is there any analytical work out there that might help?