open TELEMAC-MASCARET The mathematically superior suite of solvers

Indeed I have a quad, I didn't see it!
Moreover it's on earth...

Thank you Martin, I didn't keep the t3m, I'll try to do it again.

Francois,

The density you are specifying in this region is WAY too coarse for the shoreline geometry you are trying to resolve.
You have two choices, either simplify the shoreline geometry or specify a higher density. (shorter edge lengths)

Cheers... Martin

ok, I've simplify the shoreline geometry by removing the bays
Thank you for your advice!
François

And there is no way to define the edge length depending on the bathymetry?

Yes, if you supply the bathymetry as one of the density objects.

As I've posted previously, the mesher interpolates the local edge lengths from the "z" values of the supplied density objects. If more than 1 density object covers a potential node location, the minimum value is used.

Note: that the "z" values MUST be greater than 0, so just use the calculator and multiply your bathymetry by -1 (you have to supply depth rather than bathymetric elevation)

Cheers... Martin

Thank you Martin, the generating of the mesh is running but it's extremely slow! I hope the mesh will be ok!

it seems to work, there is just a problem on the West and North coast which are not meshed, is there a solution...
Thanks a lot for your help

Hi

It's typical of a locally wrong edge length.
If you use the bathymetry as density, did you make a mathematic operation on it's value?
I noticed you work in long/lat coordinates so maybe the origin of the problem...

Hope this helps

Hi Francois,

As Christophe said, this is a problem with how you are specifying density.

Please post your t3m file so we can suggest changes.

Cheers... Martin

I've divide the bathymetry by 100 and I get a better result. I do not really understand how to adjust the mesh size but I progress. Here is my last mesh:

and the t3m