[Users] ADMMass thorn gives a weird numbers with mesh refinement.

Petr Tsatsin ptsatsin at fau.edu
Thu Oct 4 14:57:25 CDT 2012


As far as I understand ADMMass uses metric and lapse thought ADMMacros and
it calculates derivatives of the metric inside.  All those GF looks fine.
The problem appears when I use mesh refinement.

On Thu, Oct 4, 2012 at 3:00 PM, Ian Hinder <ian.hinder at aei.mpg.de> wrote:

>
> On 4 Oct 2012, at 10:02, Petr Tsatsin wrote:
>
> Hello,
> I recently started using  ADMMass thorn and I found out the following
> problem. If I use it on the unigrid set up everything works fine, however
> if i use mesh refinement it gives correct values at t=0 but then all the
> values become something like this -3.50039744772644e+244.
> I was wondering if anybody experience such a problem? I used standard
> static_tov.par  for testing purposes.
> Thank you.
>
>
> I haven't used this thorn, but this looks like poison. i.e. variables
> which are initialised to a fixed large number in order to catch bugs.  This
> indicates that something is accessing data which has not been initialised
> properly.  Can you output the grid functions that are being used in the
> ADMMass computation and see if they are reasonable?  Alternatively, you
> could compute their norm, which should also be strongly affected by this.
>
>   --
> Ian Hinder
> http://numrel.aei.mpg.de/people/hinder
>
>


-- 
Petr Tsatsin
Graduate Student - Department of Physics
Charles E. Schmidt College of Science
Florida Atlantic University
(561)-297-3386
cell: 561-692-2040
ptsatin at fau.edu, ptsatsin at gmail.com
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