open TELEMAC-MASCARET The mathematically superior suite of solvers

Goodmorning at all,
I did a simulation for the propagation of the waves with a very big domain.
The results with scalar version are good but the same simulation with the parallel version gave very casual and wrong results. Very non sense results.
I can't understand why.

Hi
did you use a user fortran?
regards

hi,
thanks for the reply.
I compiled openTelemac in linux using gfortran.
i'm running tomawac in parallel. unfortunately, the results of the parallel computation do not match the reuslts of the scalar computation( single processor).

The results of the scalar computation are correct whereas the results of the parallel computation are completely wrong.

If you can provied any help i would be grateful to you.

I attached my systel.cfg file

Hi

You didn't answer to my question !
In your computation, did you use a "user fortran"?

Did you check the Tomawac example runs in scalar and parallel correctly?

Regards

I'm sorry, I misunderstood your question.
I used a 'user fortran' file called 'limwac.f'.
I took this fortran subrutine from the example Manche.

I attached the file that I used.

R

Did you check the example Manche works in scalar and in parallel with correct results?
I had a brief look to this example and it seems there is no parallel run of this case during the validation process...

the example of Manche run in parallel give results that are good.

I have to do somethings of particular for work in parallel?

Thanks

R

Sometimes it could be necessary take care about parallelism because node numbering change but if it works in the Manche case, this means this should be ok on this point...

I don't have any other idea

regards

Hello

If you had good results with case manche in parallel that means you were very lucky. Normally it does not work correctly in parallel because of nodes numbering.

You fill find an example of using function GLOBAL_TO_LOCAL_POINT
to deal with paralllelism in

examples/sisyphe/littoral/Tom_user_fortran/bord_wac.f

hope it helps.

hi,
i tryed to follow the example and i wrote this subroutine for my case.

The results are bad.

what i wrong?