dolfin team mailing list archive

[Robert Kirby <kirby@xxxxxxxxxxxxxxx>]

Why does the mesh get moved?  It seems like you're controlling the 
stress-strain relation, which can be solved on the same mesh 
(presumably, modulo adaptivity)?

In fact, I've long argued that this exact area is a real win for 
automation -- take the bio-engineers who don't really know how stress 
and strain are related in biological tissues but want to do experiment 
An environment that lets them rapidly try out models (and eventually 
control over them to fit parameters, compare to experiments, etc) would 
be exactly what they need to speed up or even enable their 
investigations.

Rob

On Oct 26, 2004, at 1:37 PM, Anders Logg wrote:

> On Tue, Oct 26, 2004 at 12:08:03PM -0500, Ridgway Scott wrote:
>
> > > One example is the module elasticity-updated in DOLFIN for which
> > > assembly time dominates solution time (using the old form evaluation
> > > system in DOLFIN). This would be a typical example of a system which
> > > is more complicated than Poisson and where assembly time may be
> > > significant.
> >
> > This is a good point. There are these complex-model linear problems
> > where you just form the matrix and solve. Is that what you were
> > thinking? Since you can vary the elasticity tensor these days with
> > special materials, one could even imagine optimizing over varying
> > elasticity tensors, in an extreme case.
> >
> >                                 Ridg
>
> Yes. In this case, you form the matrix, solve, and modify (move) the
> mesh in each time step. The domininating cost is the assembly.
>
> /Anders