On the Smoke object in the dynamics network, inisde the Initial data tab, the default for Velocity sampling is “Faces”. I understand that despite being slower, this gives more accurate collisions of smoke with another dynamic object.

I would like to know whether it is the same for static objects like buildings also. If not can we set velocity sampling to “Centers” for a faster simulation?

probably overkill, but if you really want to know:
http://www.sciencedirect.com/science/article/pii/S0098135498002701 [sciencedirect.com]



cheers,
koen