[Users] GRHydro::check_GRHydro_C2P_failed error

[Beyhan Karakaş]

Dear Roberto,

Thank you very much for your consideration and reply. When I change the
resolution to dx=0.375 it requires 16 gb of ram and simulation becomes 9
times slower and it would take 2.5 days to reach the 1000 simulation time.
I will try to do this and , if possible, inform you about the result.

Best regards,

Beyhan.


On Tue, Apr 14, 2020 at 8:32 PM Roberto De Pietri <roberto.depietri at unipr.it>
wrote:

> Dear Beyjann
>
> From the output, it seems that the two stars just merged and then a prompt
> collapse to  Black Hole. An Apparent Horizon was found.
>
> INFO (AHFinderDirect): proc 0: searching for horizon 1/1
> INFO (AHFinderDirect): AH 1/1: r=2.18345 at (-0.000000,0.000000,0.000000)
> INFO (AHFinderDirect): AH 1/1: area=376.8755139 m_irreducible=2.738192857
>      5952   558.000 |  129.2759814 |    0.0003459 |    0.0000439 |
>  8.9127188 |    8.4903683 |  151.5039356 |  301.5059049
>
> Dear Beyhan;
>
> Quite likely just resolution.
>
> But at the next iteration, AH finder was not able to find it again, and
> indeed the interior of the black hole was
> not excised and conservative to primitive failed close to the singularity.
>
> Resolution of dx=0.75 it is not enough for simulation, and leas dx=0.375
> is needed for having running simulation
>  when black hole form and at least 0.25 to have some useful data.
>
> Roberto
>
> On 14 Apr 2020, at 17:22, Beyhan Karakaş <beyhannkarakas at gmail.com> wrote:
>
> Dear to whom it may concern,
>
>   I am using Mayer release on Fedora 31. I have made some changes in the
> parameter file that was created by De Pietri, Feo, Maione and Loeffler in
> 2016 (which could be downloaded from
> http://www.fis.unipr.it/numrel/Research/BNS2016.html
> <https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.fis.unipr.it%2Fnumrel%2FResearch%2FBNS2016.html&data=02%7C01%7Croberto.depietri%40unipr.it%7C9856f8be4a614c36092808d7e087c54c%7Cbb064bc5b7a841ecbabed7beb3faeb1c%7C0%7C0%7C637224746075422862&sdata=dwMfDo1WyBsGfCHoyLC%2BxsgD8e7LywtPY%2BCajZwPheA%3D&reserved=0>).
> Some of the Parma Groups' thorns were used in the parameter file added to
> the end of the mail.
>
> Initial data for equal mass (M_1,2=1.7 M_sun) binary neutron stars was
> generated on LORENE using SLy EOS. Table of it was attached. Initial data
> could be downloaded from https://bitbucket.org/beyhank/bns
> <https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbitbucket.org%2Fbeyhank%2Fbns&data=02%7C01%7Croberto.depietri%40unipr.it%7C9856f8be4a614c36092808d7e087c54c%7Cbb064bc5b7a841ecbabed7beb3faeb1c%7C0%7C0%7C637224746075432863&sdata=%2FihD6LLxM2FTPBZpMQUevJecdN1yJf6Y0%2B%2FEN7xnJv4%3D&reserved=0>
> .
>
> GRHydro thorn starts to give retval after 504 simulation time and stops
> the simulation at 756 with NANs (BH formed at 558). I suppose the error
> persists either  "EinsteinEvolve/GRHydro" or "PRThorns/GRHydro" is used.
>
> I do not know whether this error is resulted from low resolution or
> something else. Same setting does not seem to give any error for the
> configuration M_1,2=1.2 M_sun.
>
> Output, error and parameter files are attached.
>
> Best regards,
>
> Beyhan.
>
>
> ---------------------------------------------------------------------------------
> # The Parma Thorns
> !TARGET   = $ARR
> !TYPE     = git
> !URL  = https://bitbucket.org/GravityPR/prthorns.git
> <https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbitbucket.org%2FGravityPR%2Fprthorns.git&data=02%7C01%7Croberto.depietri%40unipr.it%7C9856f8be4a614c36092808d7e087c54c%7Cbb064bc5b7a841ecbabed7beb3faeb1c%7C0%7C0%7C637224746075432863&sdata=PeD%2BZDceaHgO2mnDg8kKI2dmfc34Y7YmB%2BqOG383Gco%3D&reserved=0>
> !REPO_PATH= $2
> !CHECKOUT =
> PRThorns/TempPool
> PRThorns/Meudon_Bin_NS
> PRThorns/Hydro_RNSID
> PRThorns/GRHydro
> PRThorns/GRHydro_Analysis
> PRThorns/GRHydro_InitData
> <tnisan12.par><tnisan12.err><tnisan12.out><eos_sly4_pp.d>
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