Dear @Jason.Jonkman
I am currently working on my thesis, where I am using Fast.Farm.
I have a question about which time step should I use in TurbSim when using Mod_AmbWind=2? Should I use the time step defined for the low resolution grid or the one defined for the high resolution grid?
Thank you for your time.
Best Regards,
Dear @Ines.Baptista,
The big problem with the Mod_AmbWind = 2 option of FAST.Farm is that you must use the same TurbSim file for both the low- and high-resolution domains, when the spatial-temporal discretization requirements differ for these domains. To match the spatial-temporal discretization requirements for the high-resolution domains requires that the TurbSim file should have that discretization, even though that is much finer than is required for the low-resolution. Thus, it can be quite computationally expensive for small domains or impractical for large domains to generate such a TurbSim inflow.
As such, we generally recommend using Mod_AmbWind = 3 (multiple TurbSim files) in FAST.Farm if you wish to use TurbSim for inflow generation.
The Python scripts available in the OpenFAST Toolbox should be used to aid the process and follow all of the modeling guidance: openfast_toolbox/openfast_toolbox/fastfarm at main · OpenFAST/openfast_toolbox · GitHub.
Best regards,