Re: [Getfem-users] different mesh_fem definitions for different regions

[Renard Yves]

Dear Umut,

If your region is a part of a mesh (not a boundary), you can simply  
defines the mesh fem by setting a finite element method only on the  
element of this region. You can also define a mesh_fem on the whole  
mesh but specify the region to the assembly procedures (or to the  
brick if you use the new bricks in Getfem++ 4.0). The third mean is  
indeed to use a  partial_mesh_fem object. However, the implementation  
in Getfem++ 3.1 is not efficient at all. The implementation
in Getfem++ 4.0 has been simplified and optimized.

Yves.


Umut Tabak <address@hidden> a écrit :

> Dear all,
>
> I am trying to form the system matrices for an interior vibro-acoustic
> problem where some fluid domain is coupled to a structural domain. So I
> have two domains with two different mesh structure(well not really
> actually, they both have hexa linear elements but the properties are of
> course different). I am using gmsh extensively for my pre-processing
> operations, where I can import the region information directly. The
> above mentioned domains are defined as different domains, with physical
> region definitions in the geo file of Gmsh. My question is, how can I
> assign different mesh_fem objects to different regions for the above
> defined mesh. And use this info to form my system matrices in getfem++?
>
> I checked the manual there is a partial_mesh_fem object, which is
> designed for the above tasks, I suppose, it is not clear to me how to
> use this object, if it is the right one.
>
> Could some provide pointers for this?
>
> Best regards,
>
> Umut
>
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