Phoenics- old version
 

I am using Phoenics 1.5.4 version rether old to simulate wind flow across highway.Is possible for it to simulate it in a rether big size of geometry. Will it be any different if i put it the actual size 500x100x490 in metres, but grid size is about 5m to 10 m. orelse how can i scale down it? thank for whoever willing to answer my question.