phigrape/phigrape.conf

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Text

######################
# GENERAL PARAMETERS #
######################
# Plummer softening parameter (can be even 0)
eps = 1E-4
# End time of the calculation
t_end = 0.25
# Interval of snapshot files output (xxxxxx.dat)
dt_disk = 1.0
# Interval for the energy control output (contr.dat)
dt_contr = 0.125
# Interval for SMBH output (bh.dat, bh_neighbors.dat, and bh_inf.dat)
dt_bh = 0.125
# Parameter for timestep determination
eta = 0.01
# Name of the input file; use "data.con" in most cases
inp_data = data.con
##### NOT IMPLEMENTED #######################
output_format = HDF5
dt_min_warning = false
#############################################
###################################
# LIVE SUPERMASSIVE BLACK HOLE(S) #
###################################
# There is special treatment for particles representing supermassive black holes (SMBHs): they are integrated at every time step, they can have custom softening in SMBH-SMBH interactions, and post Newtonian terms can be added to the gravity.
# The number of SMBH particles. Can be 0 (no SMBH), 1, or 2. [default: 0]
live_smbh_count = 2
# Custom softening length for SMBH-SMBH interactions (can also be zero). If non-negative, the custom softening is applied. [default: -1]
live_smbh_custom_eps = 0
# Output additional diagnostics about live SMBHs. [default: false]
#TODO# dt_bh
live_smbh_output = true
# Output additional diagnostics about the SMBH's (or SMBHs') nearest neighbours (number could be set as shown below). [default: false]
live_smbh_neighbor_output = true
# Number of nearest neighbours to the SMBH (or SMBHs) to include in output. [default: 10]
live_smbh_neighbor_number = 10
##################################
# BINARY SUPERMASSIVE BLACK HOLE #
##################################
# The following parameters can be set when `live_smbh_count` is 2.
# Output additional diagnostics about the SMBH's sphere of influence (size could be set as shown below). [default: false]
binary_smbh_influence_sphere_output = true
# The influence sphere is centred at the binary SMBH's centre of mass, and its radius is the semi-major axis of the binary times the factor below. [default: 10.0]
binary_smbh_influence_radius_factor = 3.162277660168379497918067e+03
# Add post Newtonian terms to SMBH-SMBH gravity. [default: false]
binary_smbh_pn = true
####################################
# Negative powers of two #
####################################
# -1 1/2 0.5 #
# -2 1/4 0.25 #
# -3 1/8 0.125 #
# -4 1/16 0.0625 #
# -5 1/32 0.03125 #
# -6 1/64 0.015625 #
# -7 1/128 0.0078125 #
# -8 1/256 0.00390625 #
# -9 1/512 0.001953125 #
# -10 1/1024 0.0009765625 #
# -11 1/2048 0.00048828125 #
# -12 1/4096 0.000244140625 #
# -13 1/8192 0.0001220703125 #
# -14 1/16384 0.00006103515625 #
# -15 1/32768 0.000030517578125 #
# -16 1/65536 0.0000152587890625 #
####################################