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

[Petr Tsatsin]

Hi,
I did a run with
   TmunuBase::support_old_CalcTmunu_mechanism = yes
and  it works. However at the beginning several iterations i got 'poison
values' after the values ok. Another thing is that Surface Integrals
Values osculate from 0 to correct value for the ADM mass. Volume Integrated
ADM Mass looks ok.


On Thu, Oct 4, 2012 at 5:17 PM, Frank Loeffler <knarf at cct.lsu.edu> wrote:

> On Thu, Oct 04, 2012 at 03:57:25PM -0400, Petr Tsatsin wrote:
> > 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.
>
> Hi,
>
> Do values 'look ok' every so and so iterations? If so, something is
> likely to be wrong with past time levels. ADMMass performs reductions,
> which use time interpolations in case refinement levels don't line up in
> time. If past timelevels are not populated correctly this would show as
> strange numbers. Every so many iterations (depending on your setup)
> however, all refinement levels are 'at the same time'. Then no time
> interpolations are done and values should be ok.
>
> Another possibility is that because ADMMass uses ADMMacros and ADMMacros
> use the old Tmunu mechanism, this can go wrong when you do not use
>  TmunuBase::support_old_CalcTmunu_mechanism = yes (not advised in
>                                                    general: slow!)
> However, I would not expect numbers _that_ wrong in this case. However,
> I would like to know if this should indeed be the problem.
>
> Frank
>
>
>


-- 
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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