[Users] some questions regarding the use of LORENE to generate initial data for the merger of binary neutron stars.

[Zach Etienne]

Greetings! I am CCing Prof Josh Faber on this message in the hope that
perhaps he has some time to share his insights on the question you ask.

-Zach

*     *     *
Zachariah Etienne
Assoc. Prof. of Physics, U. of Idaho
Adjunct Assoc. Prof. of Physics & Astronomy, West Virginia U.
https://etienneresearch.com
https://blackholesathome.net


On Mon, Apr 15, 2024 at 6:19 AM 巾非凡文 <shenfei2002 at foxmail.com> wrote:

> Professor, hello. I am an undergraduate student from Nanjing Normal
> University. My research topic is related to the merger of binary neutron
> stars. However, I have encountered some difficulties in generating initial
> data with LORENE, and I hope to receive your assistance. Thank you very
> much.
>
> I have downloaded the LORENE library in the Fedora virtual machine
> environment and selected some test examples from the website at
> https://ccrgpages.rit.edu/~jfaber/BNSID/. Here are my specific
> operations: First, I replaced the file "binaire_orbite.C" in the Codes
> folder with the one I downloaded in the LORENE folder, and replaced the
> file "coal_seq_massscan.C" with the "coal.c" file in the
> "/Lorene/Codes/Bin_star" directory of the LORENE folder. Next, I selected
> the example in the "Data/AP4/AP4_1.8_1.4" folder on the website for
> simulation calculations. Among them, I copied the six files, "par_eos1.d",
> "par_eos2.d", "par_grid1.d", "par_grid2.d", "par_init.d", and
> "parcoal_seq.d.40km", to the "/Lorene/Codes/Bin_star" directory of the
> LORENE folder. Subsequently, I ran the command in the terminal of that
> directory. The specific command I executed is as follows:
>
> make init_bin
>
> make coal
>
> make lit_bin
>
> ./init_bin
>
> ./coal
>
> However, during the execution process, I encountered the following
> assertion error:
>
> coal: /home/lhc/Lorene/C++/Include/tbl.h:282: double&
> Lorene::Tbl::set(int): Assertion `etat == ETATQCQ' failed.
>
> Aborted (core dumped)
>
> Next, I modified the line 282 in the file
> "/home/lhc/Lorene/C++/Include/tbl.h" from etat == ETATQCQ to true and
> attempted to run it again. This time, there was no assertion error reported.
>
>
>
> After running for about an hour, I obtained the following files:
>
> However, the initial data file I obtained is different from the initial
> data files in the "Data/AP4/AP4_1.8_1.4" folder on the website
> https://ccrgpages.rit.edu/~jfaber/BNSID/. Specifically, the file I got is
> named "resu_4.000000e+01_2.080000e+00_1.550000e+00.d".
>
>
>
> Do you know why this is the case? Is it due to my incorrect operation
> steps that led to this issue?
>
> 巾非凡文
> shenfei2002 at foxmail.com
>
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