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# See the wiki page for an explanation of the params!
# https://github.com/GRChombo/GRChombo/wiki/Guide-to-parameters
#################################################
# Filesystem parameters
verbosity = 0
# location / naming of output files
output_path = "/mnt/hdd/@media/thesis_data/bbh_new/out" # Main path for all files. Must exist!
chk_prefix = BinaryBH_
plot_prefix = BinaryBHPlot_
# restart_file = BinaryBH_000360.3d.hdf5
# HDF5files are written every dt = L/N*dt_multiplier*checkpoint_interval
checkpoint_interval = 1
# set to 0 to turn off plot files (except at t=0 and t=stop_time)
# set to -1 to never ever print plotfiles
plot_interval = 1
num_plot_vars = 4
plot_vars = chi Ham Weyl4_Re Weyl4_Im
# subpaths - specific directories for hdf5, pout, extraction data
# (these are created at runtime)
hdf5_subpath = "hdf5"
pout_subpath = "pout"
data_subpath = "data"
# change the name of output files
# pout_prefix = "pout"
print_progress_only_to_rank_0 = 1
# ignore_checkpoint_name_mismatch = 0
# write_plot_ghosts = 0
#################################################
# Initial Data parameters
# provide 'offset' or 'center'
massA = 0.5
massB = 0.5
offsetA = -2 0 0
offsetB = 2 0 0
# centerA = 6 8 8
# centerB = 10 8 8
momentumA = 0.0 -0.1 0.0
momentumB = 0.0 0.1 0.0
#################################################
# Grid parameters
# 'N' is the number of subdivisions in each direction of a cubic box
# 'L' is the length of the longest side of the box, dx_coarsest = L/N
# NB - If you use reflective BC and want to specify the subdivisions and side
# of the box were there are no symmetries, specify 'N_full' and 'L_full' instead
# NB - if you have a non-cubic grid, you can specify 'N1' or 'N1_full',
# 'N2' or 'N2_full' and 'N3' or 'N3_full' ( then dx_coarsest = L/N(max) )
# NB - the N values need to be multiples of the block_factor
N_full = 32
L_full = 16
# Maximum number of times you can regrid above coarsest level
max_level = 4 # There are (max_level+1) grids, so min is zero
# need max_level entries for regrid interval
# Level Regridding: 0 1 2 3 4 5
regrid_interval = 1 1 1 1 0 0
regrid_threshold = 0.3
# Max and min box sizes
max_box_size = 32
min_box_size = 8
# tag_buffer_size = 3
# grid_buffer_size = 8
# fill_ratio = 0.7
# num_ghosts = 3
# center = 8 8 8 # defaults to center of the grid
#################################################
# Boundary Conditions parameters
# Periodic directions - 0 = false, 1 = true
isPeriodic = 0 0 0
# if not periodic, then specify the boundary type
# 0 = static, 1 = sommerfeld, 2 = reflective
# (see BoundaryConditions.hpp for details)
hi_boundary = 1 1 1
lo_boundary = 1 1 2
# if sommerfeld boundaries selected, must select
# non zero asymptotic values
nonzero_asymptotic_vars = chi h11 h22 h33 lapse
nonzero_asymptotic_values = 1.0 1.0 1.0 1.0 1.0
# if you are using extrapolating BC:
# extrapolation_order = 1
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This is a public dataset of metric data from a GRTeclyn binary black hole simulation.
Generated using a slightly modified version of the very cheap example parameter file.
The metric dataset contains these keys:

  • coords: (t,x,y,z) coordinates,
  • level of the adaptive mesh refinement,
  • g_triu: the upper diagonal components of the spacetime metric
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