open TELEMAC-MASCARET The mathematically superior suite of solvers

Hi,

I am trying to simulate a dam breach onto a wet bathymetry. I am using the ritter example provided in the files, but when i change the fortran file to prescribed water levels of say 4m upstream and 1m downstream, i get a number of errors. The file does run and produce results but when i open these in BlueKenue, the first time step is right but then it goes horribly wrong. I will attach an image of the second time step. Has anyone got any ideas on whether this testcase can be turned into a dam break onto a wet bed and if so what i might be doing wrong?

Thanks,
Alex

Hi Alex,

which scheme do you use? You should use the finite volume schemes (HLLC solver) for simulating a dam break over a wet bed. If you look at the validation document of Telemac you can see that scheme 14;5 produces some oscillations. This oscillations can increase with a coarser mesh discretization.

You should also check the time of your plot. It looks like the wave already reached the boundary at the other side?

Best regards,

Leo

Ah ok, i was using the kinetic order finite volume scheme. Will try using the HLLC solver, and investigate the time to see if there are any issues there, thanks for the help.