Some thoughts on smoke effects in game

I found some interesting articles on smoke employment in the military during my research for a practicable in-game smoke control system: When smoke is used, how will it behave over time, and what are the factors that influence it.  As with everything, this is a search for a playable compromise, we are not making meteorological simulations here.  So what I want to end up with, is a simple sequence every turn to check what happens with smoke on the table.
So I went and listed up what the results in such a sequence can be, and what parameters influence the outcome.  Smoke is an absolute necessity in a good tactical WW2 combat game, and it needs to be implemented well, the thing is to find the limit to realism.  What parameters are most important, what others will further influence the result?