[Ivancosta]

I'm doing a project for a lattice tower with FLUENT to determine the drag coefficient to be used in calculating the wind force on the structure. The analysis is in 3D, and the results that are emerging are quite different from those calculated analytically.
I used a module structure to determine the drag coefficient and applied boundary conditions for the entry of wind INLET, OUTLET output for wind and SURFACE, for surperficie my wind tunnel, that i created around the section.

The mesh is to be generated automatically in order to have good quality values​​.

The results is that they are not any good. Am I not applying any suitable option for this kind of analysis?

If someone has already done a project of this kind and that can help me I appreciate it.

hug