Wind pressure analysis on roof

Hi. I am an architect, and in last few months, am having a great difficulties at my project in calculating the stress from wind on my roof.

I heard that Solid works can do this with a great accuracy.

So are there any tutorials about this?

My roof is pretty unstandard - two curved surface.

I must admit I know nothing about Computational Fluid Dynamics/

Thank you for all the answers.

SolidworksFlow Simulation