>
> I can't say whether that's the same problem that is commonly reported in 
> the 
> literature, but this sort of mesh entanglement is the motivation for 
> people to 
> look at Arbitrary Lagrangian Eulerian (ALE) methods, instead of just 
> Eulerian 
> methods. 
>
> Can you show a picture of your mesh? Is it that just the mesh is bad, or 
> the 
> whole geometry? 
>  

Best 
>   W. 
>

The mesh is not good to begin with, here's where I begin:

double Initial_map_sphere_to_ellipsoid<spacedim>::value(const Point
<spacedim> &p, const unsigned int component)  const
{ 
  double norm_p = p.distance(Point<spacedim>(0,0,0));
  
return abc_coeffs[component]*p(component)/norm_p - p(component);   
}

void VectorHelfrichFlow<spacedim>::initialize_global_euler_vector (const 
double &a,
                                                                   const 
double &b,
                                                                   const 
double &c)
{

/* interpolate the map from triangulation to desired geometry for the first 
time */
  VectorTools::interpolate(bending_dof_handler,
                           Initial_map_sphere_to_ellipsoid<spacedim>(a,b,c),
                           global_euler_vector);
}




 
On Tuesday, November 15, 2016 at 1:27:52 AM UTC-5, Jean-Paul Pelteret wrote:
>
> Hi Thomas,
>
> Trilinos' Mesquite <https://trilinos.org/packages/mesquite/> package 
> provide mesh optimisation tools. I'd be happy to see this integrated into 
> deal.II, so if you decide that this would help you solve your problem then 
> I'd be willing to help you to do so. The challenge here would be the fact 
> that its a co-dim 1 problem, so you of course need to adjust the position 
> of vertices without changing the final topology (too much). I'm not 
> immediately sure how one could manage this without some underlying 
> parametric description of the surface, but perhaps its possible.
>
> Regards,
> J-P
>

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