We are trying to replicate wind data in TurbSim that was generated with a large-eddy simulation. Some of the LES data follow a low level jet wind profile so we’ve used the GP_LLJ spectral model and JET wind profile. The specific LES profile we are trying to replicate is below.
If we run TurbSim with a URef of 40 mps or less and default values for the Non-IEC Meteorological Boundary Conditions and Spatial Coherence Parameters, we get a reasonable profile.
But we need the mean wind speed to be above 70 mps (72 mps for the LES case mentioned above). If we run TurbSim with the same default parameters mentioned above but a URef of 72, we get a strange profile at the top and bottom of the grid.
It looks like the middle of the profile is following the LLJ profile but the top and bottom are following a log profile or something similar. I tried adjusting the RICH NO and the UStar values but those didn’t impact the profile much.
Are there any suggested changes I could make to the input file that will help? Is it possible to model the LLJ profile with higher mean wind speeds in TurbSim?
Thank you,
Amber