NOW, this is not really a SU extension but I could help but be amazed by this Android App
[I think its also on IOS]
its called WIND TUNNEL - a free and $3 Pro version
If you are interested in conceptual flow dynamics around objects [wings, cars, buildings, rivers etc]
eg sample from my Galaxy Note 12.2 [this is live screen capture]
cross section of Villa in front of a high rise building
Would love this as a $3 SU plugin 