[Users] Assertion `ox' failed
Hamilton, Maria
babiuc at marshall.edu
Wed Apr 21 15:12:59 CDT 2021
Bruno,
Awesome! Thank you for sharing! I'll give it a try!
🙂
Just a quick question: so, there is no need to "track_origin"? Also, although we expect only one merged black hole, would it be necessary to set "n_horizons = 2" ?
Maria
_______________________
Maria C. Babiuc Hamilton, Ph.D.
Professor, Department of Physics
College of Science, Marshall University,
1 John Marshall Drive, Huntington, WV, 25755
Room S 257, Phone: (304)696-2754
________________________________
From: Bruno Giacomazzo <bruno.giacomazzo at unimib.it>
Sent: Wednesday, April 21, 2021 5:12 AM
To: Erik Schnetter <schnetter at cct.lsu.edu>
Cc: Hamilton, Maria <babiuc at marshall.edu>; users at einsteintoolkit.org <users at einsteintoolkit.org>
Subject: Re: [Users] Assertion `ox' failed
x=0 is OK since in a BNS system the BH will form at the origin where the NSs merge (unless there is a kick). These are the parameters I use in my BNS runs:
#------------------ahfinderdirect----------------------------------------------
ahfinderdirect::find_after_individual_time[1] = 2000
ahfinderdirect::find_after_individual_time[2] = 2000
ahfinderdirect::find_every = 64
ahfinderdirect::geometry_interpolator_name = "Lagrange polynomial interpolation"
ahfinderdirect::geometry_interpolator_pars = "order=4"
ahfinderdirect::initial_guess__coord_sphere__radius[1] = 1
ahfinderdirect::initial_guess__coord_sphere__radius[2] = 3
ahfinderdirect::mask_buffer_thickness = 0
ahfinderdirect::mask_radius_multiplier = 0.6
ahfinderdirect::mask_radius_offset = 0
ahfinderdirect::max_allowable_horizon_radius[1] = 15
ahfinderdirect::max_allowable_horizon_radius[2] = 15
ahfinderdirect::max_allowable_theta_growth_iterations = 10
ahfinderdirect::max_allowable_theta_nonshrink_iterations = 10
ahfinderdirect::max_newton_iterations__initial = 50
ahfinderdirect::max_newton_iterations__subsequent = 50
ahfinderdirect::move_origins = yes
ahfinderdirect::n_horizons = 2
ahfinderdirect::origin_x[1] = 0
ahfinderdirect::origin_x[2] = 0
ahfinderdirect::output_h_every = 64
ahfinderdirect::predict_origin_movement = yes
ahfinderdirect::reset_horizon_after_not_finding[1] = no
ahfinderdirect::reset_horizon_after_not_finding[2] = no
ahfinderdirect::reshape_while_moving = yes
ahfinderdirect::surface_interpolator_name = "Lagrange polynomial interpolation"
ahfinderdirect::surface_interpolator_pars = "order=4"
ahfinderdirect::verbose_level = "physics details"
ahfinderdirect::which_surface_to_store_info[1] = 0
ahfinderdirect::which_surface_to_store_info[2] = 1
Il giorno mar 20 apr 2021 alle ore 19:30 Erik Schnetter <schnetter at cct.lsu.edu<mailto:schnetter at cct.lsu.edu>> ha scritto:
Maria
I see that you only set up one horizon. You need to set at least
N_horizons to 2. All parameters that you set for horizon one (those
with array index [1]), will also need to be set for the second
horizons. It's also weird that the horizon is at x=0; in a binary
system, I'd expect it to be away from the origin.
You probably want to set
AHFinderDirect::which_surface_to_store_info[2] = 1
to store information about the second horizon in a different spherical surface.
-erik
On Tue, Apr 20, 2021 at 12:56 PM Hamilton, Maria <babiuc at marshall.edu<mailto:babiuc at marshall.edu>> wrote:
>
> Hello,
>
> Could I please get some help in activating the horizon finder correctly in a bns run?
> This is what I have in the par file:
>
> ActiveThorns = "AHFinderDirect"
> AHFinderDirect::find_after_individual_time[1] = 1500
> AHFinderDirect::find_every = 64
> AHFinderDirect::output_h_every = 128
>
> AHFinderDirect::geometry_interpolator_name = "Lagrange polynomial interpolation"
> AHFinderDirect::geometry_interpolator_pars = "order=4"
> AHFinderDirect::surface_interpolator_name = "Lagrange polynomial interpolation"
> AHFinderDirect::surface_interpolator_pars = "order=4"
> AHFinderDirect::which_surface_to_store_info[1] = 0
>
> AHFinderDirect::initial_guess_method [1] = "coordinate sphere"
> AHFinderDirect::initial_guess__coord_sphere__radius[1] = 0.3
> AHFinderDirect::initial_guess__coord_sphere__x_center[1] = 0.0
>
> AHFinderDirect::N_horizons = 1
> AHFinderDirect::max_allowable_horizon_radius[1] = 3
> AHFinderDirect::reset_horizon_after_not_finding[1] = "no"
>
> AHFinderDirect::origin_x[1] = 0
> AHFinderDirect::move_origins = "yes"
> AHFinderDirect::predict_origin_movement = "yes"
> AHFinderDirect::reshape_while_moving = "yes"
>
> AHFinderDirect::track_origin_from_grid_scalar[1] = "yes"
> AHFinderDirect::track_origin_source_x[1] = "Hydro_Analysis::Hydro_Analysis_rho_max_loc[0]"
> AHFinderDirect::track_origin_source_y[1] = "Hydro_Analysis::Hydro_Analysis_rho_max_loc[1]"
> AHFinderDirect::track_origin_source_z[1] = "Hydro_Analysis::Hydro_Analysis_rho_max_loc[2]"
> AHFinderDirect::track_origin_from_grid_scalar[2] = "yes"
> AHFinderDirect::track_origin_source_x[2] = "Hydro_Analysis::Hydro_Analysis_rho_max_loc[0]"
> AHFinderDirect::track_origin_source_y[2] = "Hydro_Analysis::Hydro_Analysis_rho_max_loc[1]"
> AHFinderDirect::track_origin_source_z[2] = "Hydro_Analysis::Hydro_Analysis_rho_max_loc[2]"
>
>
> And this is what happens when is activated:
>
> cactus_bns: /home/babiuc/ET_2020_11/Cactus/configs/bns/build/AHFinderDirect/driver/Newton.cc:109: void AHFinderDirect::track_origin(const cGH*, AHFinderDirect::patch_system&, AHFinderDirect::AH_data*, int, bool): Assertion `ox' failed.
> Rank 0 with PID 22304 received signal 6
> Writing backtrace to BNS_BSSN_Sly_myAHF_dx12/backtrace.0.txt
> -------------------------------------------------------
> Primary job terminated normally, but 1 process returned
> a non-zero exit code. Per user-direction, the job has been aborted.
>
>
> thanks,
> Maria
> _______________________
> Maria C. Babiuc Hamilton, Ph.D.
> Professor, Department of Physics
> College of Science, Marshall University,
> 1 John Marshall Drive, Huntington, WV, 25755
> Room S 257, Phone: (304)696-2754
>
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