[yt-users] p = pc.add_slice("Density", ax)

[Britton Smith]

I think Jeff's interpretation is correct.  The dark matter particles are too
massive with respect to the mass of the gas in the grid cells.  Since the
force resolution of the gravity solver on the root grid is 2 *dx, it makes
sense to run with twice the number of grid cells as particles in one
direction, but I don't think increasing that ratio any higher is a good
idea.

Britton

On Wed, Feb 9, 2011 at 2:06 PM, j s oishi <jsoishi at gmail.com> wrote:

> Hi Shankar,
>
> I'm not an expert on large scale structure, but this looks completely
> correct to me in the sense that yt and enzo appear to be doing just
> what you would expect. if you increase the grid resolution without
> increasing the number of dark matter particles, eventually you will
> reach a point where individual dark matter particles will accrete gas.
> If you want to increase grid resolution without a concomitant increase
> in particle number, you may need to re think your initial conditions.
>
> At any rate, I don't think this is a yt issue.
>
> thanks,
>
> jeff
>
> On Wed, Feb 9, 2011 at 10:48 AM, Agarwal, Shankar <sagarwal at ku.edu> wrote:
> > Hi,
> >
> > I have made gas density projections (attached) for two identical
> simulations, except than one was run with GriDims=512 while the second was
> run with GridDims=1024. The BoxSize=200 Mpc/h and ParticleDims=256 for both.
> >
> > Can anyone tell me why does the 1024grid.png look a lot grainier than the
> 512grid.png ? Is it something to do with this command...
> >
> >  p = pc.add_slice("Density", ax)
> >
> > I guess the slice is too thin for 1024, so I can't really compare the 2
> plots. Let me know.
> >
> >
> > Sorry to have attached 2 huge files. Are there other ways?
> >
> > Shankar
> > _______________________________________________
> > yt-users mailing list
> > yt-users at lists.spacepope.org
> > http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
> >
> >
> _______________________________________________
> yt-users mailing list
> yt-users at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.spacepope.org/pipermail/yt-users-spacepope.org/attachments/20110209/eea6b811/attachment.htm>