open TELEMAC-MASCARET The mathematically superior suite of solvers

Hi,
I was wondering anyone could help me with the following problems. in fact, I think problem one is encapsulated in the second issue.

1) I am trying to model a flow in a rectilinear channel. When I construct the mesh I can't get a very good definition of the corner points - in some cases they end up getting missed out. This is presumably because the default edge length defined along the boundary doesn't necessarily coincide with the end of each segment.

I tried defining a hard point, but again, I guess the default edge length means that these points just get missed out. How do other people get around this problem?

2) For another simulation I am trying to model a rectilinear channel but with a headland on one side. I would like to increase the mesh resolution near the headland but on the other side, as the bounding wall is just straight I figure the mesh resolution could be higher.


Inspired (perhaps tormented, as I can't quite recreate the method) by something I saw in the telemac user conference, I have tried creating a closed line that surrounds the computational domain with a prescribed default edge length which is large and then defining an open line with a small edge length on the side adjacent to the headland. So, when I generate the mesh, the points inside grow in density. However, using this to define the density of the computational mesh is beyond me.

I hope I have explained these issues clearly. Can anyone help?

Hi spbristol
Your problems have been addressed in a tutorial which you should have access to, if you follow the BlueKenue Topic “first version of a french tutorial for blue kenue”.
Soon there will be an english version. But in the meantime:

Don’t be afraid to use hard lines, which have their points as close as you wish, to specify corners of your mesh.

Use closed lines to specify a mesh density inside a region. The mesh density inside the line is defined by the "value" of the line, not its individual points.

Thierry

Thanks, that was helpful. Do you know of any other guides that are useful to newcomers on the Telemac website? Language isn't a barrier. In particular, something about how to implement the new TPXO tidal boundary conditions would be very useful.

Thanks,