[Users] BHNS simulation issues - Hamiltonian constraint violations and general problems

[Konrad Topolski]

Hi all

I am trying to run a BH-NS simulation using at least one of some (and
sometimes more) unofficial thors.
That would be Kadath for the initial data and possibly THC for hydro
evolution.
I'm trying to run the simulation either with GRHydro or with THC.

In both cases I believe that the initial data gets imported correctly - I
have looked at some simple visuals which I'm attaching to this mail.

However, as the simulation proceeds, huge hamiltonian constraint violations
occur and e.x. the lapse gets driven to 0 globally. This can also be seen.

How can I help this? Is it because the puncture is not tracked correctly?
Trying to set up a PunctureTracker at the location of the black hole yields
a failure very soon, as the shift at puncture is said to be (nan, nan, nan).

I'm sending the .par files, outputs (.out), errors (.err) and visualization
(.png).

Best regards
Konrad
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: LAPSE_THC_ITER112.png
Type: image/png
Size: 14854 bytes
Desc: not available
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0007.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Ham_GRHydro_ITER16.png
Type: image/png
Size: 9773 bytes
Desc: not available
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0008.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Ham_THC_ITER0.png
Type: image/png
Size: 9943 bytes
Desc: not available
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0009.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: LAPSE_THC_ITER0.png
Type: image/png
Size: 14900 bytes
Desc: not available
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0010.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: LAPSE_THC_ITER176.png
Type: image/png
Size: 12489 bytes
Desc: not available
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0011.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Ham_THC_ITER80.png
Type: image/png
Size: 8197 bytes
Desc: not available
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0012.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Ham_GRHydro_ITER0.png
Type: image/png
Size: 10237 bytes
Desc: not available
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0013.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: BHNS_THC.par
Type: application/octet-stream
Size: 11913 bytes
Desc: not available
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0006.obj 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: THC_BHNS_output.out
Type: application/octet-stream
Size: 272325 bytes
Desc: not available
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0007.obj 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: THC_BHNS_error.err
Type: application/octet-stream
Size: 12624 bytes
Desc: not available
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0008.obj 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: BHNS_GRHydro.par
Type: application/octet-stream
Size: 21497 bytes
Desc: not available
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0009.obj 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: GRHydro_BHNS_error.err
Type: application/octet-stream
Size: 82628 bytes
Desc: not available
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0010.obj 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: GRHydro_BHNS_output.out
Type: application/octet-stream
Size: 215403 bytes
Desc: not available
Url : http://lists.einsteintoolkit.org/pipermail/users/attachments/20210821/230e7015/attachment-0011.obj