[Cactuseinstein] Stellar Collapse

[Tom Goodale]

Just to clarify this, there would be no problem at all in putting a
one-dimensional simulation in, which is what you would want for spherical
symmetry.  However, all the current Einstein stuff is geared to three-d,
and certain of the Einstein analysis routines assume a cartesian grid,
e.g. for wave extraction and horizon finding, so if you do not want to
write any code, you'd need to do 3-d with a cartesian coordinate system,
which is where using Cartoon may save you some effort - we have even
spoken in the past about doing the Cartoon treatment in two directions at
once, which would effectivelygive you a 1-d pencil through a 3-d
spherically-symmetric system in cartesian coordinates.

There are many one-d spherical collapse codes out there which could be
ported to Cactus very easily, and this has been discussed in the past.

Tom


On Tue, 11 May 2004, Christian David Ott wrote:

>
>
> Hi Joel,
>
> unfortunately, there isn't (yet).
>
> Currently, Cactus is only working with Cartesian grids, making it
> ill-suited for purely one-dimensional, spherically-symmetric calculations.
>
> The closest you can get is using an octant of a Cartesian box and then
> applying Cartoon boundary conditions (see Shibata et al).
>
> Hope this helps,
>
>     Christian
>
>
>
> On Tue, 11 May 2004, Joel Brownstein wrote:
>
> > Is there any reference dedicated to a very simple implementation of
> > cactus with a Spherically Symmetric stellar collapse?
> >
> > _______________________________________________
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> > Cactuseinstein at cactuscode.org
> > http://www.cactuscode.org/mailman/listinfo/cactuseinstein
> >
> >
>
>