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# Demonstrate pretracking in a binary black hole collision.
# 2004-01-10 Erik Schnetter <schnetter@aei.mpg.de>
# $Header$
# Most parameter settings are fairly standard and should be looked up
# in their respective thorns. Mostly the pretracking parameters are
# explained.
Cactus::cctk_run_title = "Pretracking the common apparent horizon with Brill-Lindquist black holes"
Cactus::cctk_timer_output = full
Cactus::cctk_full_warnings = yes
Cactus::terminate = time
Cactus::cctk_final_time = 5.0
ActiveThorns = "CoordBase SymBase"
ActiveThorns = "LocalInterp AEILocalInterp"
ActiveThorns = "NaNCatcher"
ActiveThorns = "TGRtensor"
ActiveThorns = "SphericalSurface"
ActiveThorns = "IOUtil"
IO::out_dir = $parfile
ActiveThorns = "PUGH PUGHInterp PUGHReduce PUGHSlab"
driver::global_nx = 35
driver::global_ny = 35
driver::global_nz = 43
driver::ghost_size = 2
ActiveThorns = "NaNChecker"
NaNChecker::check_every = 1
NaNChecker::action_if_found = terminate
NaNChecker::check_vars = "ADMBase::gxx"
ActiveThorns = "Boundary CartGrid3D"
grid::type = byspacing
grid::dxyz = 0.125
grid::domain = octant
ActiveThorns = "Time MoL SpaceMask Dissipation"
Time::dtfac = 0.25
MoL::ODE_Method = RK3
Dissipation::epsdis = 0.3
Dissipation::vars = "ADM_BSSN::ADM_BSSN_phi ADM_BSSN::ADM_BSSN_metric ADM_BSSN::ADM_BSSN_K ADM_BSSN::ADM_BSSN_curv ADM_BSSN::ADM_BSSN_gamma ADMBase::lapse"
ActiveThorns = "ADMBase ADMCoupling ADMMacros CoordGauge StaticConformal"
ADMBase::metric_type = "static conformal"
ActiveThorns = "IDAnalyticBH"
ADMBase::initial_data = bl_bh
IDAnalyticBH::bl_nbh = 2
IDAnalyticBH::bl_z0_1 = +1.0
IDAnalyticBH::bl_z0_2 = -1.0
ActiveThorns = "BSSN_MoL"
ADMBase::evolution_method = ADM_BSSN
BSSN_MoL::bound = newrad
BSSN_MoL::stencil_size = 2
BSSN_MoL::advection = upwind2
ADMBase::initial_lapse = one
ADMBase::lapse_evolution_method = 1+log
BSSN_MoL::lapsesource = standard
BSSN_MoL::harmonic_f = 2.0
ADMBase::initial_shift = none
ActiveThorns = "ADMConstraints"
ActiveThorns = "AHFinder"
AHFinder::ahf_verbose = yes
#AHFinder::ahf_veryverbose = yes
AHFinder::ahf_active = yes
AHFinder::ahf_findevery = 1
AHFinder::ahf_guessold = yes
AHFinder::ahf_manual_guess = yes
AHFinder::ahf_l0_guess = +2.5
AHFinder::ahf_l2_guess = +0.2
AHFinder::ahf_ntheta = 36
AHFinder::ahf_nphi = 72
AHFinder::ahf_octant = high
AHFinder::ahf_1Doutput = yes
ActiveThorns = "SphericalSurface AHFinderDirect"
# less output
#AHFinderDirect::verbose_level = "physics highlights"
AHFinderDirect::N_horizons = 12
AHFinderDirect::find_every = 1
AHFinderDirect::max_Newton_iterations__initial = 20
AHFinderDirect::max_Newton_iterations__subsequent = 20
AHFinderDirect::max_allowable_Theta_growth_iterations = 10
AHFinderDirect::max_allowable_Theta_nonshrink_iterations = 10
# these always seem to be positive, even for inner horizons
AHFinderDirect::want_expansion_gradients = yes
# individual apparent horizon
AHFinderDirect::origin_z[1] = 1.0
AHFinderDirect::initial_guess__coord_sphere__z_center[1] = 1.0
AHFinderDirect::initial_guess__coord_sphere__radius[1] = 0.5
# common apparent horizon
AHFinderDirect::initial_guess__coord_sphere__radius[2] = 3.5
# pretrack: find CE surface with smallest Theta_l
# (this is the simplest method, but it might not work)
AHFinderDirect::use_pretracking[3] = yes
AHFinderDirect::initial_guess__coord_sphere__radius[3] = 3.5
AHFinderDirect::pretracking_value[3] = 0.1
AHFinderDirect::pretracking_minimum_value[3] = -1.0
AHFinderDirect::pretracking_maximum_value[3] = 1.0
AHFinderDirect::pretracking_delta[3] = 0.01
AHFinderDirect::pretracking_minimum_delta[3] = 0.0001
AHFinderDirect::pretracking_maximum_delta[3] = 0.01
AHFinderDirect::smoothing_factor[3] = 0.25
# pretrack: find CE surface with smallest (Theta_l r)
# (this is probably the best method)
AHFinderDirect::use_pretracking[4] = yes
AHFinderDirect::surface_modification[4] = "radius"
AHFinderDirect::initial_guess__coord_sphere__radius[4] = 3.5
AHFinderDirect::pretracking_value[4] = 0.1
AHFinderDirect::pretracking_minimum_value[4] = -1.0
AHFinderDirect::pretracking_maximum_value[4] = 1.0
AHFinderDirect::pretracking_delta[4] = 0.01
AHFinderDirect::pretracking_minimum_delta[4] = 0.0001
AHFinderDirect::pretracking_maximum_delta[4] = 0.01
AHFinderDirect::smoothing_factor[4] = 0.25
# pretrack: find CE surface with smallest (Theta_l r^2)
# (this is probably another good method)
AHFinderDirect::use_pretracking[5] = yes
AHFinderDirect::surface_modification[5] = "radius^2"
AHFinderDirect::initial_guess__coord_sphere__radius[5] = 3.5
AHFinderDirect::pretracking_value[5] = 0.1
AHFinderDirect::pretracking_minimum_value[5] = -1.0
AHFinderDirect::pretracking_maximum_value[5] = 1.0
AHFinderDirect::pretracking_delta[5] = 0.01
AHFinderDirect::pretracking_minimum_delta[5] = 0.0001
AHFinderDirect::pretracking_maximum_delta[5] = 0.01
AHFinderDirect::smoothing_factor[5] = 0.25
# pretrack: find CE surface with smallest mean coordinate radius
# (this might not find the horizon, or if it does, it might find it later)
AHFinderDirect::use_pretracking[6] = yes
AHFinderDirect::surface_selection[6] = "mean coordinate radius"
AHFinderDirect::initial_guess__coord_sphere__radius[6] = 3.5
AHFinderDirect::pretracking_value[6] = 2.0
AHFinderDirect::pretracking_minimum_value[6] = 0.0
AHFinderDirect::pretracking_maximum_value[6] = 10.0
AHFinderDirect::pretracking_delta[6] = 0.1
AHFinderDirect::pretracking_minimum_delta[6] = 0.0001
AHFinderDirect::pretracking_maximum_delta[6] = 0.1
AHFinderDirect::smoothing_factor[6] = 0.25
# dependent surface: find CE surface with [smallest (Theta_l r)] + offset
AHFinderDirect::depends_on[7] = 4
AHFinderDirect::surface_modification[7] = "radius"
AHFinderDirect::initial_guess__coord_sphere__radius[7] = 3.5
AHFinderDirect::desired_value_offset[7] = -0.01
# dependent surface: find CE surface with [smallest (Theta_l r)] + offset
AHFinderDirect::depends_on[8] = 4
AHFinderDirect::surface_modification[8] = "radius"
AHFinderDirect::initial_guess__coord_sphere__radius[8] = 3.5
AHFinderDirect::desired_value_offset[8] = 0.01
# dependent surface: find CE surface with [smallest (Theta_l r^2)] + offset
AHFinderDirect::depends_on[9] = 5
AHFinderDirect::surface_modification[9] = "radius^2"
AHFinderDirect::initial_guess__coord_sphere__radius[9] = 3.5
AHFinderDirect::desired_value_offset[9] = -0.01
# dependent surface: find CE surface with [smallest (Theta_l r^2)] + offset
AHFinderDirect::depends_on[10] = 5
AHFinderDirect::surface_modification[10] = "radius^2"
AHFinderDirect::initial_guess__coord_sphere__radius[10] = 3.5
AHFinderDirect::desired_value_offset[10] = 0.01
# pretrack: find CE surface with smallest (Theta_l r)
# try to find an inner horizon
AHFinderDirect::use_pretracking[11] = yes
AHFinderDirect::surface_modification[11] = "radius"
AHFinderDirect::initial_guess__coord_sphere__radius[11] = 3.5
AHFinderDirect::pretracking_value[11] = 0.1
AHFinderDirect::pretracking_minimum_value[11] = -1.0
AHFinderDirect::pretracking_maximum_value[11] = 1.0
AHFinderDirect::pretracking_delta[11] = 0.01
AHFinderDirect::pretracking_minimum_delta[11] = 0.0001
AHFinderDirect::pretracking_maximum_delta[11] = 0.01
# pretrack: find CE surface with smallest (Theta_l r)
# desperately try to find an inner horizon
AHFinderDirect::use_pretracking[12] = yes
AHFinderDirect::surface_modification[12] = "radius"
AHFinderDirect::initial_guess__coord_sphere__radius[12] = 3.5
AHFinderDirect::pretracking_value[12] = 0.1
AHFinderDirect::pretracking_minimum_value[12] = -1.0
AHFinderDirect::pretracking_maximum_value[12] = 1.0
AHFinderDirect::pretracking_delta[12] = 0.01
AHFinderDirect::pretracking_minimum_delta[12] = 0.0001
AHFinderDirect::pretracking_maximum_delta[12] = 0.01
AHFinderDirect::smoothing_factor[12] = -0.25
ActiveThorns = "HTTPD Socket"
HTTPD::use_pthreads = yes
ActiveThorns = "IOASCII IOBasic"
IOBasic::outInfo_every = 1
IOBasic::outInfo_reductions = "norm2"
IOBasic::outInfo_vars = "ADMBase::gxx ADMConstraints::ham"
IOBasic::outScalar_every = 1
IOBasic::outScalar_style = gnuplot
IOBasic::out_format = ".15g"
IOBasic::outScalar_reductions = "minimum maximum norm1 norm2 norm_inf"
IOBasic::outScalar_vars = "
StaticConformal::confac
ADMBase::metric
ADMBase::curv
ADMBase::lapse
ADMConstraints::hamiltonian
ADMConstraints::momentum
ADM_BSSN::ADM_BSSN_ham
ADM_BSSN::ADM_BSSN_normham
ADM_BSSN::ADM_BSSN_mom
ADM_BSSN::ADM_BSSN_dG
ADM_BSSN::ADM_BSSN_A
ADM_BSSN::ADM_BSSN_S
"
IOASCII::out1D_every = 1
IOASCII::out1D_style = "gnuplot f(x)"
IOASCII::out1D_vars = "
StaticConformal::confac
ADMBase::metric
ADMBase::curv
ADMBase::lapse
ADMConstraints::hamiltonian
ADMConstraints::momentum
ADM_BSSN::ADM_BSSN_ham
ADM_BSSN::ADM_BSSN_normham
ADM_BSSN::ADM_BSSN_mom
ADM_BSSN::ADM_BSSN_dG
ADM_BSSN::ADM_BSSN_A
ADM_BSSN::ADM_BSSN_S
"
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