open TELEMAC-MASCARET The mathematically superior suite of solvers

Hi all,

I'm having trouble wrapping my head around how to use tracers and point sources to simulate salinity (or any other contaminant) exiting a point source on the mesh. So far, I've tried specifying 1 and 2 point source location(s) with GLOBAL NUMBERS OF SOURCE NODES, specifying 1 or 2 tracers with names 'SALINITY KG/M3 ', and specifying initial and boundary values for tracers (at this stage, I just want a constant outflow of salinity from 1-2 points). I also specified some diffusion/advection parameters but I cannot recall what I used.
The results I am getting are disappointing, as the result is a uniform distribution of salinity across the whole domain.
Moreover, I am confused as when I specify 1 tracer, only 1 boundary condition is required but when I specify 2 tracers, 4 boundary conditions are required… does the number of BCs scale with the square of the number of tracers?

My main reference has been chapters 8 and 9 of the TELEMAC-2D user manual, as well as the validation manual and sample case for tracers (cone). However, I feel there is some gap in my knowledge and understanding of tracers that I just don't know how to fill ("you don't know what you don't know" principle).
My goal is to simulate the outflow of a high salinity mixture into a freshwater river. Apologies for not including CAS files, but I don't have a definite case put together yet and tried to put something together as a proof of concept using the riogrande example case.

Any guidance is welcome. As mentioned, I have read the manuals but do not yet understand how tracers work and why the salinity is constant across the whole domain.

Kind regards,
André Renault

Hi André
I agree with you that 1 tracer, 1 boundary condition is ok if you have only 1 liquid boundary and 2 tracers 4 boundary condition is okay if you have 2 liquid boundaries...
In the riogrande tests case, the cli file is not defined for tracer...
SO event you're trying to create a POC, this could be good for us to join your steering file (and the modified test case file) to let us reproduce what you observed and try to help you efficiently.
Regards