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Re: [Getfem-users] Open mesh

From: Yves Renard
Subject: Re: [Getfem-users] Open mesh
Date: Thu, 29 Apr 2010 11:13:44 +0200
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Daer Anne-Lise,

You are right, there is no specific tool for the moment in Getfem++ to deal 
with such a situation. This is not a trivial task to produce a generic 
algorithm for the automatic re-interpolation (or projection) of a field after 
refinement or change of the mesh. So, for the moment, depending on the 
situation, a specific strategy have to be developped for each situation.


On mercredi 28 avril 2010, GUILMIN Anne-Lise wrote:
> Dear all,
> I am working with an open mesh: I add convexes to the mesh before each
> new increment.
> I would like to keep the values of my model variables from one increment
> to another.
> As the mesh changes, the numbering of the dof may change too. Is there
> any predefined function to interpolate the old values on the new
> mesh_fem?
> You may have already met this problem when refining meshes.
> For now, I construct a new mesh_fem, then new vectors of variables from
> an interpolation of old ones on the new mesh_fem, and finally I
> overwrite the old meshfem and variables in the model with the new ones.
> This works well with my main variable but not with lagrangian
> multipliers:  the computation stops due to an error of context of the
> model after updating the partial_mesh_fem on which are defined the
> multipliers.
> How could I update a partial_mesh_fem and still get a correct context
> for my model?
> Thank you for your help.
> Anne-Lise Guilmin
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  Yves Renard (address@hidden)       tel : (33)
  Pole de Mathematiques, INSA-Lyon             fax : (33)
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  69621 Villeurbanne Cedex, FRANCE


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