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Re: [Getfem-users] Abnormal (?) results in elastostatic test?

From: Yves Renard
Subject: Re: [Getfem-users] Abnormal (?) results in elastostatic test?
Date: Wed, 5 Nov 2008 10:54:47 +0100
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Dear Artur Pozniak,

In fact, the program was used  for various tests and its 
structure suffers.
In particular here, the parameter FT is used for the definition of the exact 
solution (function sol_u, line 68). An exact solution is prescribed to 
quantify the approximation error, so the shape of the solution is only due to 
the choice of the exact solution.

The selection for Neumann and Dirichlet boundaries is made on line 318 and 
after. Indeed in the curent version, the Neumann boundary is the upper face, 
and the Dirichlet boundary is the rest of the boundary.


On Tuesday 04 November 2008 01:46, Artur Poźniak wrote:
> Dear Developers, Users,
> I've noticed (ploting with mayavi (1, 2) and paraview) that results of
> ./elastostatic in tests/ seem a bit strange to me. In one
> reads - ,,Neumann boundary on upper face, Dirichlet elsewhere``. I would
> expect lower, right and left face unchanged, while only few points remain
> constrained. I would be pleased if somebody would explain in few words what
> is the meaning of FT parameter, which affects the solution.
> I would appreciate any, even the simpliest checked, workin source file
> dealing
> Thanks in advance
> Artur Pozniak


  Yves Renard (address@hidden)       tel : (33)
  Pole de Mathematiques, INSA-Lyon             fax : (33)
  20, rue Albert Einstein
  69621 Villeurbanne Cedex, FRANCE


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