How to apply constraints in the inside of the computing domain?

[Tom Li]

Hi everyone;

I am trying to use dealii to solve a possion function in a computing domain with different coefficient.

 And I am tring to use a constraints like this in the inside of the computing domain.

The computing domain is a rectangular with a ellipse which is in the center of the domain.And The eliipse represebt “p”.The othes represent "m".This constraint is in the interface between "m" and "p".So how should I use this kind of constraint in the dealii?Thanks a lot! 

[Wolfgang Bangerth]

On 6/27/23 07:26, Tom Li wrote:
> *** Caution: EXTERNAL Sender ***

>
> Hi everyone;
> I am trying to use dealii to solve a possion function in a computing domain
> with different coefficient.
>

> functin.PNG
>
>  And I am tring to use a constraints like this in the inside of the computing
> domain.

> ff.PNG
> The computing domain is a rectangular with a ellipse which is in the center of
> the domain.And The eliipse represebt “p”.The othes represent "m".This
> constraint is in the interface between "m" and "p".So how should I use this
> kind of constraint in the dealii?Thanks a lot!

Tom,
this isn't all that easy to do with constraints, but I imagine you will want
to look at step-60 and step-85 for inspiration on how to approach these kinds
of problems!

Best
W.


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Wolfgang Bangerth email: bang...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/