open TELEMAC-MASCARET The mathematically superior suite of solvers

Hi,

Normally in telemac when at one of the boundaries an imposed boundary condition (Dirchlet boundary conditions) exists with an outflow condition, telemac change the boundary automatically to be free boundary (Nuemann). Is there away to change this so that the imposed boundary stayed imposed even in outflow condition. If yes, can I make this in part of the water column(for instance the bottom half of the water column)

Regards,
Mohamed

Hello, sorry for the late answer.

you cannot do this, since by definition the flow is exiting the domain, thus the value at the boundary dependent strongly on what is going out from within your domain.

what you could do, is to set the value at your boundary. TELEMAC will change it though, but it will also use your imposed as well.

Note that this is not conservative -- thus why we cannot allow it in the standard version.

Hope this helps,
Sébastien.