Upper-limit wave height

[louis9353]

Hello

I'm using the HOS-NWT model for a while and I was wondering if there is some kind of upper-limit for the wave height? For instance I wanted to plot a wave field with a frequency of 1 Hz and a wave height of 0.5 m. This gave me some problems because the model didn't finished with calculating. I have added my input file as a picture. Thank you in advance!

Kind regards
Louis

[gducrozet]

Dear Louis,

HOS-NWT is based on potential flow formalism and consequently cannot model wave breaking. Then, this defines an upper limit for the wave height. As a consequence, you should restrict your study to non-breaking waves. When generating waves with a wavemaker, it is complicated to go beyond H/lambda=0.1 in regular waves (even if you can try to play with the duration of the time ramp to increase very slightly this practical limit).
Some developments have been made towards the inclusion of breaking models within HOS-NWT, but they are not available in the open-source version yet.

Best regards,
Guillaume

[louis9353]

Dear Guillaume

Thank you very much for your quick and helpful response! I had a feeling it had something to do with the ratio of H/lamba but I couldn't find it specifically in the code so that's why I thought I was doing something wrong.

Kind regards
Louis