For this simulation of a bigger wind turbine we programmed a custom function in OpenFOAM to include the effect of increasing wind speed with distance from the ground.
For background information see here:
http://rheologic.net/en/transient-cfd-simulation-wind-power
This is the newer version of this video, the older version can be found here: https://youtu.be/xRr_Ww72wI8
Enjoy!
