open TELEMAC-MASCARET The mathematically superior suite of solvers

Hi,
I’m trying to set up a TOMAWAC-model for a smaller bay. I already have wave-data for the outer boundary of the bay. This wave data is in the format of Hs, Tp, and direction and values are given every hour. I wonder if it is possible to use this wave-file as input to the model?

Thanks!

hello

Unfortunately this is not (yet) implemented in Tomawac and you have to use a fortran user to read your file in the routine limwac and then call speini to initialize the variance spectrum.

regards

T.

Hello,

I meddled with this topic sometime ago, and this is what I came up with. You are welcome to use it and/or modify it to accommodate your needs. If you make improvements/corrections, please let me know.

Let me know if it works out.

Pat

Thank you!

I got it running, but the model don't seem to consider the input from the file.

Can you please attach a cas-file were you have implemented the princi.f (I assume I miss something in my cas-file).

Hello,

Here is what I had in my *.cas file:

Hope it helps,

Pat

Hello,

I'm actually working on the same subject, implementing wave series as boundary condition on TOMAWAC and coupling those results to TELEMAC2D. I've used your attachments in previous message.

I've tried to compile my .cas file but this error occured :
"**** ERROR LIMWAC ****
YOU DID NOT MODIFY THE BOUNDARY SPECTRUM WHEREAS YOU ASK fOR THAT".

I've found that this error comes from LIMWAC.f so does it mean that tomawac doesn't take into account my own fortran file ? If it's the case, how could I do to solve my problem ?

I've attached my files to explain my words.

Many thanks,

Romain

Hello,

In one of your steering files the keyword LIMIT SPECTRUM MODIFIED BY USER = YES, and in the other it is set to NO [by default]. Could this be the offending keyword?

Also, I didn't see the initialization and specification of the spectrum parameters in the *.cas file. Can you try running a case first with a wave that doesn't vary in time. Does it work?

Pat

Hello,

I think that LIMIT SPECTRUM MODIFIED BY USER is not in the vocabulary of TELEMAC2D so I didn't need to set differently.
I've tried to simulate a wave only with initial condition and not with specific boundaries, is that what you mean by a constant wave ? But unfortunatly, Telemac2d still doesn't present what I expect.

Many thanks,

Romain

Hello,

LIMIT SPECTRUM MODIFIED BY USER is a TOMAWAC keyword, and should be set to TRUE in the TOMAWAC steering file.

I think you have to have both initial and boundary conditions for the simulation to be valid and have reasonable results. I meant try setting boundary conditions for a case where waves don't vary with time. There should be plenty of examples of this.

Pat

Now our model works (mine and SEBJAMs) but we are not fully satisfied with the output. The simulated wave heights are not as smooth as the input on the boundary. I have attached both the cas-file and a picture comparing the results and the input boundary data. It seems to get better when I decrease the time step but the computation is taking unreasonable long time if I lower it much more (now 60 s).

We would appriciate any help on this and other tips on how to decrease the computaion time!