Hi all,

At the Gothenburg workshop I was challenged by Eric Paterson on whether it is possible to generate complex sea states using the wave generation method I presented.

For those of you interested, a simple example is given here:

www.student.dtu.dk/~ngja/seaState.mpg

Cheers,

Niels

P.S. Some issues still remain with respect to BCs, as unphysical velocities appear in the air phase.

Hi all

I have been asked what I mean by "faulty superposition" as given in the movie. As it is a superposition of two non-linear (Stokes 2nd order theory) waves, ideally the wave-wave interaction between these waves should be included in the relaxation zone, see e.g. Sharma and Dean (1981), Second-Order Directional Seas and Associated
Wave Forces.

However this is not important for the proof of concept.

Best regards,

Niels

Niels, very nice! This is a very important development, and I look forward to using your work some day when you release it to the community. Good job!

I agree, this is quite impressive. Now that you have the proof-of-concept for multiple wave components I think this could be extended to generating sea spectrum with random phasing. Another challenge would be to add the capability for multi-directional wave generation using sea-scatter diagrams.

Great job Niels, I look forward to using your wave boundary condition and seeing your implementation.

Hi Kevin

Yes I agree, for actual constal/offshore/maritime engineering naturally looking seas would be the way to go. However their are some limitations on wave theories for irregular waves in intermediate/shallow water, so it might not be straight out of the box.

In deep water, however, it is not a problem to specify correct seas. Implementing these can potentially be done in less than a day, having the formulas ready.

Cheers,

Niels