Question About Time Step Handling in TurbSim and OpenFAST

Wind & Water Computer-Aided Engineering Software Tools
1

Hello NREL Team,

I would like to ask about the use of different time steps in OpenFAST and TurbSim.

Suppose I use a time step of 0.0125 seconds in the .fst file, while the time step in the .bts file is 0.05 seconds. In this case, does ElastoDyn interpolate the wind speed field internally?

More generally, could you clarify how the wind field is handled when the time steps differ between TurbSim and OpenFAST?

Thank you for your time and guidance.

Best regards

Riad

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Dear @Riad.Elhamoud,

Yes, that is correct. OpenFAST will interpolate the ambient wind data from TurbSim if the time steps are not aligned. Whether the time-interpolation is linear or cubic will depend on the setting of InflowWind input parameter VelInterpCubic.

Best regards,

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