[Carpet] buffer zones

[Ian Hawke]

On Fri, 2006-05-19 at 16:24 +0200, Frank Loeffler wrote:

> > then you nullify the effect of the mesh
> > refinement (as interpolating from the coarse grid loses you the
> > additional accuracy that the fine grid should give you).
> 
> Ok, that is the loss of performance I was talking about. I am more 
> concerned of lower convergence than expected.

I don't immediately see how it would impact on convergence (certainly
not global convergence). Maybe a couple of points would not converge in
the expected way?


> I have 6 instead of the needed 4. I think this does not count as _really_?

Unless your grid is only about 15 points across, no.

Ian