open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello all

I have made a hydrodynamic model for the Irish Sea (Bristol Channel) using TELEMAC2D 6.1. The model reads the input tidal constituents for the open boundaries using FORMATTED DATA FILE 1 command in the cas file.

There is something strange about running TELEMAC using several processors. When I run the model using a single processor, I get convincing results. However when I run it using several processors (with the same exact setting just changing the number of processors from 0 to 16), I get different results.

In particular, the phases are OK but the tidal elevations are about 10~15% underestimated.

I was wondering if anybody else has faced this issue?
BTW, I tested two different compilers and I still have this problem.

Reza

Hello Reza,

I wonder if the problem could not come from your implementation of the open boundary conditions, in particular for parallel (this is very tricky). Can you send your Fortran file, your Formatted data file, your steering file and your boundary conditions file, please? I could have a look when I have time.

Regards,

Chi-Tuan

Hi Reza,

We are seeing the same behavior when running Telemac on different # of processors. Could you figure out what was causing the difference?

Thanks,