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Re: [ff3d-users] FF3D: Trying to used ff3d with several objects


From: Stephane Del Pino
Subject: Re: [ff3d-users] FF3D: Trying to used ff3d with several objects
Date: Wed, 26 Nov 2003 19:39:40 +0100
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Dear Joerg,

The situation is the following:

On Wednesday 26 November 2003 16:42, Joerg R. Weimar wrote:
> domain O = domain(S,inside(<1,1,0>));
Here, you set your computational domain to be 'inside(<1,1,0>)'.
So the only available boundary is referenced by '<1,1,0>'.

Then, you try to impose boundary conditions on borders that are not defined as 
borders of the computational domain.
>      u = 5  on <1,0,0>;
>      u = -5  on <0,0,1>;
This is forbiden because doing so one cannot always determine what is 
effectively the mesh to associate to the reference.

If you want to impose conditions on borders "inside" the domain, you have to 
defined them another way. Try to use the following instructions

domain O1 = domain(S, inside(<1,0,0>));
mesh s1 = surface(<1,0,0>,O1,M);

and then specify the boundary condition writing

        u = 5 on s1;

I hope that helps,
Stephane.

- -- 
Stéphane Del Pino          Tel: (33)144277170 - Fax: (33)144277200
Laboratoire Jacques-Louis Lions - Université Pierre et Marie Curie
- -+-
http://www.freefem.org
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