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# This parameter file sets up Brill-Lindquist initial data and finds the
# apparent horizons in it with AHFinderDirect.
########################################
#
# ***** output setup (also see below for more output stuff) *****
#
ActiveThorns = "IOUtil"
IOUtil::parfile_write = "no"
IO::out_dir = $parfile
########################################
#
# basic grid setup
#
ActiveThorns = "Carpet CarpetLib CarpetInterp CarpetReduce"
Carpet::domain_from_coordbase = true
ActiveThorns = "SymBase Boundary"
ActiveThorns = "CoordBase"
CoordBase::domainsize = "minmax"
CoordBase::xmin = -3.0
CoordBase::xmax = +3.0
CoordBase::ymin = -3.0
CoordBase::ymax = +3.0
CoordBase::zmin = -3.0
CoordBase::zmax = +3.0
CoordBase::dx = 0.15
CoordBase::dy = 0.15
CoordBase::dz = 0.15
#
# ghost zones
#
driver::ghost_size_x = 2
driver::ghost_size_y = 2
driver::ghost_size_z = 2
# ghost zones are outside the nominal grid
CoordBase::boundary_internal_x_lower = false
CoordBase::boundary_internal_x_upper = false
CoordBase::boundary_internal_y_lower = false
CoordBase::boundary_internal_y_upper = false
CoordBase::boundary_internal_z_lower = false
CoordBase::boundary_internal_z_upper = false
# ghost zone widths
CoordBase::boundary_size_x_lower = 2
CoordBase::boundary_size_x_upper = 2
CoordBase::boundary_size_y_lower = 2
CoordBase::boundary_size_y_upper = 2
CoordBase::boundary_size_z_lower = 2
CoordBase::boundary_size_z_upper = 2
# ghost zones start 0.5 point outside nominal grid boundary
CoordBase::boundary_shiftout_x_lower = 0
CoordBase::boundary_shiftout_x_upper = 0
CoordBase::boundary_shiftout_y_lower = 0
CoordBase::boundary_shiftout_y_upper = 0
CoordBase::boundary_shiftout_z_lower = 0
CoordBase::boundary_shiftout_z_upper = 0
# staggered grids everywhere
CoordBase::boundary_staggered_x_lower = true
CoordBase::boundary_staggered_x_upper = true
CoordBase::boundary_staggered_y_lower = true
CoordBase::boundary_staggered_y_upper = true
CoordBase::boundary_staggered_z_lower = true
CoordBase::boundary_staggered_z_upper = true
ActiveThorns = "CartGrid3D"
CartGrid3D::type = "CoordBase"
########################################
########################################
#
# physics
#
ActiveThorns = "ADMBase ADMCoupling CoordGauge StaticConformal"
ActiveThorns = "IDAnalyticBH"
ADMBase::initial_data = "bl_bh"
IDAnalyticBH::bl_nbh = 2
IDAnalyticBH::bl_m_1 = 1.0
IDAnalyticBH::bl_x0_1 = 0.0
IDAnalyticBH::bl_y0_1 = 0.0
IDAnalyticBH::bl_z0_1 = 1.0
IDAnalyticBH::bl_m_2 = 1.0
IDAnalyticBH::bl_x0_2 = 0.0
IDAnalyticBH::bl_y0_2 = 0.0
IDAnalyticBH::bl_z0_2 = -1.0
########################################
#
# numerical methods
#
Cactus::cctk_itlast = 0
ADMBase::metric_type = "static conformal"
StaticConformal::conformal_storage = "factor+derivs+2nd derivs"
ADMBase::evolution_method = "none"
ADMBase::initial_lapse = "Cadez"
ADMBase::lapse_evolution_method = "static"
ADMBase::initial_shift = "zero"
ADMBase::shift_evolution_method = "static"
########################################
#
# apparent horizons
#
ActiveThorns = "SpaceMask"
SpaceMask::use_mask = true
ActiveThorns = "SphericalSurface"
ActiveThorns = "AEILocalInterp AHFinderDirect"
AHFinderDirect::print_timing_stats = "true"
AHFinderDirect::verbose_level = "algorithm highlights"
AHFinderDirect::h_base_file_name = "bl.h"
AHFinderDirect::BH_diagnostics_base_file_name = "bl.BH_diagnostics"
AHFinderDirect::N_horizons = 2
AHFinderDirect::set_mask_for_all_horizons = true
AHFinderDirect::origin_x[1] = 0.0
AHFinderDirect::origin_y[1] = 0.0
AHFinderDirect::origin_z[1] = +1.0
AHFinderDirect::initial_guess_method[1] = "coordinate sphere"
AHFinderDirect::initial_guess__coord_sphere__x_center[1] = 0.0
AHFinderDirect::initial_guess__coord_sphere__y_center[1] = 0.0
AHFinderDirect::initial_guess__coord_sphere__z_center[1] = +1.0
AHFinderDirect::initial_guess__coord_sphere__radius[1] = 0.5
AHFinderDirect::origin_x[2] = 0.0
AHFinderDirect::origin_y[2] = 0.0
AHFinderDirect::origin_z[2] = -1.0
AHFinderDirect::initial_guess_method[2] = "coordinate sphere"
AHFinderDirect::initial_guess__coord_sphere__x_center[2] = 0.0
AHFinderDirect::initial_guess__coord_sphere__y_center[2] = 0.0
AHFinderDirect::initial_guess__coord_sphere__z_center[2] = -1.0
AHFinderDirect::initial_guess__coord_sphere__radius[2] = 0.5
########################################
#
# ASCII output
#
########################################
ActiveThorns = "CarpetIOASCII"
CarpetIOASCII::out3D_ghosts = true
CarpetIOASCII::out3D_outer_ghosts = true
IOASCII::out2d_every = 1
IOASCII::out2d_vars = "SpaceMask::emask"
########################################
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