Below is a tutorial by Mario Vergara on how to install and use Winair (this link also contains a tutorial). WinAir is a plugin to perform CFD analysis (wind flow) on a mesh using Ecotect. The video tutorial is in Spanish but very easy to follow even without sound. There are couple questions already online on the Autodesk forum about Win Air. and some work on the GH forum related to it.



Above: The Winair Interface on ecotect 

Above: The kind of results extracted from Winair 

 Work by Alessio Erioli using WinAir