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AMSS_NCKU_Input.py Executable file
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#################################################
##
## This file provides the input parameters required for numerical relativity.
## XIAOQU
## 2024/03/19 --- 2025/09/14
##
#################################################
import numpy
#################################################
## Setting MPI processes and the output file directory
File_directory = "GW150914" ## output file directory
Output_directory = "binary_output" ## binary data file directory
## The file directory name should not be too long
MPI_processes = 64 ## number of mpi processes used in the simulation
GPU_Calculation = "no" ## Use GPU or not
## (prefer "no" in the current version, because the GPU part may have bugs when integrated in this Python interface)
CPU_Part = 1.0
GPU_Part = 0.0
#################################################
#################################################
## Setting the physical system and numerical method
Symmetry = "equatorial-symmetry" ## Symmetry of System: choose equatorial-symmetry、no-symmetry、octant-symmetry
Equation_Class = "BSSN" ## Evolution Equation: choose "BSSN", "BSSN-EScalar", "BSSN-EM", "Z4C"
## If "BSSN-EScalar" is chosen, it is necessary to set other parameters below
Initial_Data_Method = "Ansorg-TwoPuncture" ## initial data method: choose "Ansorg-TwoPuncture", "Lousto-Analytical", "Cao-Analytical", "KerrSchild-Analytical"
Time_Evolution_Method = "runge-kutta-45" ## time evolution method: choose "runge-kutta-45"
Finite_Diffenence_Method = "4th-order" ## finite-difference method: choose "2nd-order", "4th-order", "6th-order", "8th-order"
#################################################
#################################################
## Setting the time evolutionary information
Start_Evolution_Time = 0.0 ## start evolution time t0
Final_Evolution_Time = 1000.0 ## final evolution time t1
Check_Time = 100.0
Dump_Time = 100.0 ## time inteval dT for dumping binary data
D2_Dump_Time = 100.0 ## dump the ascii data for 2d surface after dT'
Analysis_Time = 0.1 ## dump the puncture position and GW psi4 after dT"
Evolution_Step_Number = 10000000 ## stop the calculation after the maximal step number
Courant_Factor = 0.5 ## Courant Factor
Dissipation = 0.15 ## Kreiss-Oliger Dissipation Strength
#################################################
#################################################
## Setting the grid structure
basic_grid_set = "Patch" ## grid structure: choose "Patch" or "Shell-Patch"
grid_center_set = "Cell" ## grid center: chose "Cell" or "Vertex"
grid_level = 9 ## total number of AMR grid levels
static_grid_level = 5 ## number of AMR static grid levels
moving_grid_level = grid_level - static_grid_level ## number of AMR moving grid levels
analysis_level = 0
refinement_level = 3 ## time refinement start from this grid level
largest_box_xyz_max = [320.0, 320.0, 320.0] ## scale of the largest box
## not ne cess ary to be cubic for "Patch" grid s tructure
## need to be a cubic box for "Shell-Patch" grid structure
largest_box_xyz_min = - numpy.array(largest_box_xyz_max)
static_grid_number = 96 ## grid points of each static AMR grid (in x direction)
## (grid points in y and z directions are automatically adjusted)
moving_grid_number = 48 ## grid points of each moving AMR grid
shell_grid_number = [32, 32, 100] ## grid points of Shell-Patch grid
## in (phi, theta, r) direction
devide_factor = 2.0 ## resolution between different grid levels dh0/dh1, only support 2.0 now
static_grid_type = 'Linear' ## AMR static grid structure , only supports "Linear"
moving_grid_type = 'Linear' ## AMR moving grid structure , only supports "Linear"
quarter_sphere_number = 96 ## grid number of 1/4 s pher ical surface
## (which is needed for evaluating the spherical surface integral)
#################################################
#################################################
## Setting the puncture information
puncture_number = 2
position_BH = numpy.zeros( (puncture_number, 3) )
parameter_BH = numpy.zeros( (puncture_number, 3) )
dimensionless_spin_BH = numpy.zeros( (puncture_number, 3) )
momentum_BH = numpy.zeros( (puncture_number, 3) )
puncture_data_set = "Manually" ## Method to give Puncture’s positions and momentum
## choose "Manually" or "Automatically-BBH"
## Prefer to choose "Manually", because "Automatically-BBH" is developing now
## initial orbital distance and ellipticity for BBHs system
## ( needed for "Automatically-BBH" case , not affect the "Manually" case )
Distance = 10.0
e0 = 0.0
## black hole parameter (M Q* a*)
parameter_BH[0] = [ 36.0/(36.0+29.0), 0.0, +0.31 ]
parameter_BH[1] = [ 29.0/(36.0+29.0), 0.0, -0.46 ]
## dimensionless spin in each direction
dimensionless_spin_BH[0] = [ 0.0, 0.0, +0.31 ]
dimensionless_spin_BH[1] = [ 0.0, 0.0, -0.46 ]
## use Brugmann's convention
## -----0-----> y
## - +
#---------------------------------------------
## If puncture_data_set is chosen to be "Manually", it is necessary to set the position and momentum of each puncture manually
## initial position for each puncture
position_BH[0] = [ 0.0, 10.0*29.0/(36.0+29.0), 0.0 ]
position_BH[1] = [ 0.0, -10.0*36.0/(36.0+29.0), 0.0 ]
## initial mumentum for each puncture
## (needed for "Manually" case, does not affect the "Automatically-BBH" case)
momentum_BH[0] = [ -0.09530152296974252, -0.00084541526517121, 0.0 ]
momentum_BH[1] = [ +0.09530152296974252, +0.00084541526517121, 0.0 ]
#################################################
#################################################
## Setting the gravitational wave information
GW_L_max = 4 ## maximal L number in gravitational wave
GW_M_max = 4 ## maximal M number in gravitational wave
Detector_Number = 12 ## number of dector
Detector_Rmin = 50.0 ## nearest dector distance
Detector_Rmax = 160.0 ## farest dector distance
#################################################
#################################################
## Setting the apprent horizon
AHF_Find = "no" ## whether to find the apparent horizon: choose "yes" or "no"
AHF_Find_Every = 24
AHF_Dump_Time = 20.0
#################################################
#################################################
## Other parameters (testing)
## Only influence the Equation_Class = "BSSN-EScalar" case
FR_a2 = 3.0 ## f(R) = R + a2 * R^2
FR_l2 = 10000.0
FR_phi0 = 0.00005
FR_r0 = 120.0
FR_sigma0 = 8.0
FR_Choice = 2 ## Choice options: 1 2 3 4 5
## 1: phi(r) = phi0 * Exp(-(r-r0)**2/sigma0)
## V(r) = 0
## 2: phi(r) = phi0 * a2^2/(1+a2^2)
## V(r) = Exp(-8*Sqrt(PI/3)*phi(r)) * (1-Exp(4*Sqrt(PI/3)*phi(r)))**2 / (32*PI*a2)
## 3: Schrodinger-Newton gived by system phi(r)
## V(r) = Exp(-8*Sqrt(PI/3)*phi(r)) * (1-Exp(4*Sqrt(PI/3)*phi(r)))**2 / (32*PI*a2)
## 4: phi(r) = phi0 * 0.5 * ( tanh((r+r0)/sigma0) - tanh((r-r0)/sigma0) )
## V(r) = 0
## f(R) = R + a2*R^2 with a2 = +oo
## 5: phi(r) = phi0 * Exp(-(r-r0)**2/sigma)
## V(r) = 0
#################################################
#################################################
## Other parameters (testing)
## (please do not change if not necessary)
boundary_choice = "BAM-choice" ## Sommerfeld boundary condition : choose "BAM-choice" or "Shibata-choice"
## prefer "BAM-choice"
gauge_choice = 0 ## gauge choice
## 0: B^i gauge
## 1: David's puncture gauge
## 2: MB B^i gauge
## 3: RIT B^i gauge
## 4: MB beta gauge
## 5: RIT beta gauge
## 6: MGB1 B^i gauge
## 7: MGB2 B^i gauge
## prefer 0 or 1
tetrad_type = 2 ## tetradtype
## v:r; u: phi; w: theta
## v^a = (x,y,z)
## 0: orthonormal order: v,u,w
## v^a = (x,y,z)
## m = (phi - i theta)/sqrt(2)
## following Frans, Eq.(8) of PRD 75, 124018(2007)
## 1: orthonormal order: w,u,v
## m = (theta + i phi)/sqrt(2)
## following Sperhake, Eq.(3.2) of PRD 85, 124062(2012)
## 2: orthonormal order: v,u,w
## v_a = (x,y,z)
## m = (phi - i theta)/sqrt(2)
## following Frans, Eq.(8) of PRD 75, 124018(2007)
## this version recommend set to 2
## prefer 2
#################################################