Re: [Getfem-users] Implementing nonlinearity with multiple variables

[Yves Renard]

Dear Xilexio,

The high-level generic assembly should be the easiest way, yes. It is
not fully stable, but for such a simple use, it should work correctly.
If it could help you, I can send you an archive whith the current
version (i.e. with no need to use autogen.sh).

Yves.


Le 16/02/2014 12:24, Xilexio a écrit :
> I'm trying to implement discretization of reaction-diffusion PDEs
> (u_t(x,t) - D^2 u(x,t) = f(u(x,t)), where my unknown (u : R^2 x R ->
> R^3) is multi-dimensional (not a vector though) and function f
> (R^3->R^3) is a rational function (P_k/P_l). I'm having trouble with
> discretizing f(u(x,t)). I'm using getfem 4.2 on Windows, mingw32 (with
> muparser).
>
> Is there a way to implement discretization of f(u(x,t)) without using
> internal functions?
>
> Basic nonlinear brick supports only a single scalar field variable and
> low-level generic assembly requires coding non-linear term using
> getfem++'s internals.
>
> I'd use high-level generic assembly from svn trunk's getfem++, but it
> doesn't ./configure for me (after ./autogen.sh, ./configure has syntax
> errors in config.status and, after repairing it, missing Makefiles and
> other files).
>
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-- 

  Yves Renard (address@hidden)       tel : (33) 04.72.43.87.08
  Pole de Mathematiques, INSA-Lyon             fax : (33) 04.72.43.85.29
  20, rue Albert Einstein
  69621 Villeurbanne Cedex, FRANCE
  http://math.univ-lyon1.fr/~renard

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