Wave elevation time series

Wind & Water Computer-Aided Engineering Software Tools
2

Dear Masih,

With WaveMod = 5, I would expect the wave elevation output by HydroDyn to match the input wave elevation only if:

  • Second-order wave kinematics are disabled i.e. WvDiffQTF = WvSumQTF = False. With WaveMod = 5, the input wave elevation is assumed to be first-order such that the second-order terms are added to it, which would have some influence on the wave elevation.
  • The lower and upper cut-off frequencies of the first-order wave spectrum are disabled i.e. WvLowCOff = 0 and WvHiCOff > WaveOmegaMax.

These issues have been discussed a bit in the following forum topic: User input kinematics for floater in FAST - #5 by Jason.Jonkman.

Best regards,