open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello everyone,
I'm writing here because I've got strange results from a simulation.
In order to understand the problem you should have a look at the 4 pictures I enclosed.

in picture "immagine" I selected one point (n°780580) on the BOTTOM mesh: it has elevation= 4.45.
in picture "immagine2" I selected one point (n°780543) on the BOTTOM mesh: it has elevation= 13.49.

point 780580 is connected to another one in the mesh to create a pipe.
there is a sort of wall between the two points.
I run a simulation with a discharge that should be contained in the river bed (represented with the coarse mesh).
what is strange is that, at a certain time, the water level at point n°780589 is 0.15m (Immagine3) and at node n°780543 is 0.13 (Immagine4).
theoretically the water level would not be more than zero in point n°780543 until the water level in the river bed increases a lot! (not only 0.15m).
I think I set something wrong in Fudaa so I attach also my cas file.

I hope to have correctly expressed my problem.

Thank you in advance for your suggestions.

Daniele

I suspect you are seeing "weird" results because of the steep gradient in element size transition in your mesh.
It is recommended that adjacent elements differ in size by at most 20%.

Martin

Thank you.
So it is not possibile to represent levees or walls?

Daniele

Hello,

You can represent levees or walls, when you have a non zero depth on a boundary, the boundary is supposed to be a vertical wall. If you want to have a levee that can be submerged it is necessary to have a sufficient number of points on the levee, to have a smooth rising of the water. It is true that your mesh is very irregular.

Regards,

JMH