I'm searching a (free) software that simulates the effect of strong wind on the vulnerability a tree.
Dear Lorenzo Marzini
ArcGIS and ENVI are good options
You can find some articles that can help
Conference Paper Wind Flow simulation in urban area using open source software
Article Software tool for the analysis of potential impact of wind f...
Article Interactive effects of wind speed, vegetation coverage and s...
Article The application of GIS and 3D graphic software to visual imp...
https://www.youtube.com/results?search_query=gis+wind+simulation
This question as you might already known has been mostly addressed by means of physical models. In numerical models (CFD) vegetation is most usually represented as rigid elements, but this is used to understand the effect of vegetation on the flow field, which is I believe the inverse question to yours.
After a quick google search I came up with this papers, which seems to be going in the direction you want.
Article Eulerian-Lagrangian flow-vegetation interaction model using ...
They make use of OpenFoam as modelling platform, which would have been one of my first guesses to try to answer your question.
Hope it helps
ANSYS or CFD Software is the best one but unfortunately, it is commercial.
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