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Matthieu Schaller authoredMatthieu Schaller authored
makeIC.py 3.07 KiB
###############################################################################
# This file is part of SWIFT.
# Copyright (c) 2016 Matthieu Schaller (matthieu.schaller@durham.ac.uk)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################
import h5py
from numpy import *
# Generates a swift IC file for the 2D Sod Shock in a periodic box
# Parameters
gamma = 5./3. # Gas adiabatic index
gamma = 5./3. # Gas adiabatic index
rho0 = 1. # Background density
P0 = 1.e-6 # Background pressure
fileName = "noh.hdf5"
#---------------------------------------------------
glass = h5py.File("glassPlane_128.hdf5", "r")
vol = 4.
pos = glass["/PartType0/Coordinates"][:,:] * sqrt(vol)
h = glass["/PartType0/SmoothingLength"][:] * sqrt(vol)
numPart = size(h)
# Generate extra arrays
v = zeros((numPart, 3))
ids = linspace(1, numPart, numPart)
m = zeros(numPart)
u = zeros(numPart)
m[:] = rho0 * vol / numPart
u[:] = P0 / (rho0 * (gamma - 1))
# Make radial velocities
#r = sqrt((pos[:,0]-1.)**2 + (pos[:,1]-1.)**2)
#theta = arctan2((pos[:,1]-1.), (pos[:,0]-1.))
v[:,0] = -(pos[:,0] - 1.)
v[:,1] = -(pos[:,1] - 1.)
norm_v = sqrt(v[:,0]**2 + v[:,1]**2)
v[:,0] /= norm_v
v[:,1] /= norm_v
#File
file = h5py.File(fileName, 'w')
# Header
grp = file.create_group("/Header")
grp.attrs["BoxSize"] = [sqrt(vol), sqrt(vol), 1.]
grp.attrs["NumPart_Total"] = [numPart, 0, 0, 0, 0, 0]
grp.attrs["NumPart_Total_HighWord"] = [0, 0, 0, 0, 0, 0]
grp.attrs["NumPart_ThisFile"] = [numPart, 0, 0, 0, 0, 0]
grp.attrs["Time"] = 0.0
grp.attrs["NumFilesPerSnapshot"] = 1
grp.attrs["MassTable"] = [0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
grp.attrs["Flag_Entropy_ICs"] = 0
grp.attrs["Dimension"] = 2
#Runtime parameters
grp = file.create_group("/RuntimePars")
grp.attrs["PeriodicBoundariesOn"] = 1
#Units
grp = file.create_group("/Units")
grp.attrs["Unit length in cgs (U_L)"] = 1.
grp.attrs["Unit mass in cgs (U_M)"] = 1.
grp.attrs["Unit time in cgs (U_t)"] = 1.
grp.attrs["Unit current in cgs (U_I)"] = 1.
grp.attrs["Unit temperature in cgs (U_T)"] = 1.
#Particle group
grp = file.create_group("/PartType0")
grp.create_dataset('Coordinates', data=pos, dtype='d')
grp.create_dataset('Velocities', data=v, dtype='f')
grp.create_dataset('Masses', data=m, dtype='f')
grp.create_dataset('SmoothingLength', data=h, dtype='f')
grp.create_dataset('InternalEnergy', data=u, dtype='f')
grp.create_dataset('ParticleIDs', data=ids, dtype='L')
file.close()