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Hello,

I am trying to understand how "Prescribed elevation" works and affects my simulation. Please what is the difference between free surface and water depth.

From the Telemac3D, I see that Prescribed Boundary is used to set free surface while the boundary file is the water depth.

Regards,
Chijioke

I would be glad if someone could help me with this:

The difference between free surface, water depth and bottom in Telemac.

Hi Chijioke,

The relation is as follow:
Water depth = Free surface - Bottom

Regards,
Laurent

Hello Laurent,

As a follow-up, please what parameter is specified in the liquid boundary file: depth or free surface?

Regards,
Chijioke.

Hi Chijioke,

For a boundary with prescribed depth, you have to provide the free surface in the liquid boundaries file. You can have a look at the section 4.2.5 (T2D) or 4.3.8 (T3D) of the user manual or the numerous examples using a liquid boundaries file.
Note that Telemac will automatically compute the depth from the bottom and your prescribed free surface values to finally impose the depth.

Regards,
Laurent

Very helpful.
Thank you Laurent.