open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello everyone,

I'm encountering persistent problems with my tidal channel simulation, specifically regarding velocity errors that appear randomly when low tide conditions expose tidal flats. I've consulted the manual but need additional guidance.

Problem Description:

* My simulation models a tidal channel with extensive tidal flats
* During low tide periods, I'm getting random velocity errors in the areas where tidal flats are exposed or nearly exposed
* These velocity values seem physically unrealistic and don't follow expected patterns
* The errors appear to be most pronounced at the transition between wet and dry areas

What I've Already Tried:

* Various numerical schemes for the velocity, tracer
* Reduced courant number
* Tidal flats setting

I'll append my .cas file with some images for further explanation

Many thanks in advance,

Ahmed Salah

Apparently, I can't upload the images. anyway, here is the google drive link containing the data that could help further explanation.

drive.google.com/drive/u/0/folders/1ez1Q...E_Hu_7el-C-VmWgeqxFB