open TELEMAC-MASCARET The mathematically superior suite of solvers

I think I need to redo my tomawac file.
It seems tomawac is passing FX & FY=0 to telemac3d.

Is there an example cas that I can follow for wind-wave generation from nil wave spectrum for a closed basin?

In fetch_limited, you will find many examples of the use of wind generation. You can also check turning wind.

there is also an exercise we give to teach people how to take wind into account.

Hi Thierry,

Thanks for the help. Trying some of the changes I saw in the documented examples helped debug the issue.

The problem was the NF (number of frequencies was too low).

f=fmin*ratio^(NF-1). I had NF=12.

For wind-wave, the upper frequency needed is a bit higher. So essentially I wasn't resolving the wind-waves & the FX,FY passed back was zero. I tried with NF=50 (as in the examples) and it worked.

One question, NF=50 slows the computation. But since wind-wave freq is mostly on the higher freqs (I only have local wind-waves in model), does it make sense to increase either fmin & ratio and decrease NF to reduce compute time.

Thanks,
Shiv

Yes it is the problem with wind you can't really know in advance what will be your frequencies

yes of course if your frequencies are higher it makes sens to increase fmin. Usually for ratio, it is better to take 1.1 or 1.05.

What you can do to fix fmin, is recording a directionnal spectrum (with
PUNCTUAL RESULTS FILE, ABSCISSAE OF SPECTRUM PRINTOUT POINTS, ORDINATES OF SPECTRUM PRINTOUT POINTS) and then open the file to see what is your minimal frequency)

if you use 1D SPECTRA RESULTS FILE you will have directly the frequencies in ascii mode.