open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello!
I am Giulia, a new user of Telemac.
I'm trying to model salt intrusion in a river estuary. As a first simulation, I would like to model just the river.
I have attached a screenshot of the domain and configuration files. I applied a prescribed Flowrates boundary condition with salinity tracer in the uphill part and a prescribed elevation (constant)condition at the estuary.

I tried to run the simulation but I receive this error that I can't understand.
Thank you a lot if you can help me !

MASS BALANCE
INITIAL VOLUME OF WATER IN THE DOMAIN : 14663310.294480609
CALCOT: PLANES 1 AND 2
INTERCROSS AT POINT 37
LOWER POINT : 0.0000000000000000
HIGHER POINT: -1.2783950407657523E-017
DIFFERENCE : -1.2783950407657523E-017
DEPTH : -5.1135801630630091E-017

PLANTE: PROGRAM STOPPED AFTER AN ERROR
RETURNING EXIT CODE: 2

job aborted:
[ranks] message

[0] application aborted
aborting MPI_COMM_WORLD (comm=0x44000000), error 2, comm rank 0

---- error analysis

---

[0] on DESKTOP-G5H7JG3
C:\examples\Giulia\29apr\piave.cas_2024-05-01-11h31min56s\out_telemac3d.exe aborted the job. abort code 2

---- error analysis

---

Traceback (most recent call last):
File "C:\V8P4\scripts\python3\telemac3d.py", line 7, in <module>
main('telemac3d')
File "C:\V8P4\scripts\python3\runcode.py", line 288, in main
run_study(cas_file, code_name, options)
File "C:\V8P4\scripts\python3\execution\run_cas.py", line 169, in run_study
run_local_cas(my_study, options)
File "C:\V8P4\scripts\python3\execution\run_cas.py", line 65, in run_local_cas
my_study.run(options)
File "C:\V8P4\scripts\python3\execution\study.py", line 644, in run
self.run_local()
File "C:\V8P4\scripts\python3\execution\study.py", line 465, in run_local
run_code(self.run_cmd, self.sortie_file)
File "C:\V8P4\scripts\python3\execution\run.py", line 182, in run_code
raise TelemacException('Fail to run\n'+exe)
utils.exceptions.TelemacException: Fail to run
mpiexec -n 1 C:\examples\Giulia\29apr\piave.cas_2024-05-01-11h31min56s\out_telemac3d.exe

Hello Giulia,

If you do not use default values for keywords, be sure you use them by purpose. Some combos in the examples are done because the geometry is special.

In your case, you seem to have dry areas in your model. In that case, you have to user TIDAL FLATS = YES (default value).

Please also read carefully the TELEMAC-3D user manual, in particular the Recommendations appendix (E).

In your case, if I were you, I would use:
- NON-HYDROSTATIC VERSION = YES (default) in particular in an estuary where you have the concurrence between salted and fresh water,
- LIPS scheme at least for tracers (SCHEME FOR ADVECTION OF TRACERS = 4 + SCHEME OPTION FOR ADVECTION OF TRACERS = 4 which are the default choices),

Hope this helps,

Chi-Tuan

Hello!
thank you everybody!

I tried again my simulation with some changes and it worked :)
But then I tried with NON-HYDROSTATIC VERSION = YES as you suggested, but the computation is exceding the maximum number of timesteps from the first timestep.
I tried with a shorter time-step (0.5 instaed of 2) but still the same problem

Hello,

The resolution of the Poisson equation may be hard to do at the beginning of your simulation. You can relax the keyword ACCURACY FOR PPE, to e.g. 1.E-4 at the beginning. Those are only warnings. If there are only a few during your computation, it it not a problem.

Hope this helps,

Chi-Tuan

Hello Giulia,

I'm no T3D expert, but I'm guessing there is a point where your Z mesh crosses itself:

I don't know how to fix this, but perhaps the TIDAL FLATS keyword as mentioned by Chi-Tuan can help.