Commit 58a9668e authored by Matthieu Schaller's avatar Matthieu Schaller
Browse files

Added the initial conditions for a Sod shock test following the description of...

Added the initial conditions for a Sod shock test following the description of arXiv:0808.1844. Better glass files will have to be generated to avoid suprious effects.


Former-commit-id: d084077eec18e58df653480a8c8f65996e4b8627
parent e726fb0f
###############################################################################
# This file is part of SWIFT.
# Coypright (c) 2012 Pedro Gonnet (pedro.gonnet@durham.ac.uk),
# 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
import random
from numpy import *
# Generates a swift IC file for the Sod Shock in a periodic box
# Parameters
periodic= 1 # 1 For periodic box
boxSize = 1.
L = 100 # Number of particles along one axis
P1 = 1. # Pressure left state
P2 = 0.1795 # Pressure right state
gamma = 5./3. # Gas adiabatic index
fileName = "sodShock.hdf5"
#---------------------------------------------------
#Read in high density glass
glass1 = h5py.File("../Glass/glass_12500.hdf5")
pos1 = glass1["/PartType0/Coordinates"][:,:]
pos1 = pos1 / 20. # Particles are in [0:0.5, 0:0.5, 0:0.5]
#Read in high density glass
glass2 = h5py.File("../Glass/glass_3125.hdf5")
pos2 = glass2["/PartType0/Coordinates"][:,:]
pos2 = pos2 / 20. # Particles are in [0:0.5, 0:0.5, 0:0.5]
#Generate high density region
rho1 = size(pos1) / size(pos2)
coord1 = append(pos1, pos1 + [0, 0.5, 0], 0)
coord1 = append(coord1, pos1 + [0, 0, 0.5], 0)
coord1 = append(coord1, pos1 + [0, 0.5, 0.5], 0)
N1 = size(coord1)/3
v1 = zeros((N1, 3))
h1 = ones((N1, 1)) * 2.251 * 0.5 / (size(pos1)/3)**(1./3.)
u1 = ones((N1, 1)) * P1 / ((gamma - 1.) * rho1)
m1 = ones((N1, 1)) * 0.5 * rho1 / N1
#Generate low density region
rho2 = 1.
coord2 = append(pos2, pos2 + [0, 0.5, 0], 0)
coord2 = append(coord2, pos2 + [0, 0, 0.5], 0)
coord2 = append(coord2, pos2 + [0, 0.5, 0.5], 0)
N2 = size(coord2)/3
v2 = zeros((N2, 3))
h2 = ones((N2, 1)) * 2.251 * 0.5 / (size(pos2)/3)**(1./3.)
u2 = ones((N2, 1)) * P2 / ((gamma - 1.) * rho2)
m2 = ones((N2, 1)) * 0.5 * rho2 / N2
#Merge arrays
numPart = N1 + N2
coords = append(coord1, coord2+[0.5, 0., 0.], 0)
v = append(v1, v2,0)
h = append(h1, h2,0)
u = append(u1, u2,0)
m = append(m1, m2,0)
ids = zeros((numPart, 1), dtype='L')
for i in range(numPart):
ids[i] = i
#File
file = h5py.File(fileName, 'w')
# Header
grp = file.create_group("/Header")
grp.attrs["BoxSize"] = boxSize
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, 0, 0, 0, 0, 0]
#Runtime parameters
grp = file.create_group("/RuntimePars")
grp.attrs["PeriodicBoundariesOn"] = periodic
#Particle group
grp = file.create_group("/PartType0")
ds = grp.create_dataset('Coordinates', (numPart, 3), 'd')
ds[()] = coords
ds = grp.create_dataset('Velocities', (numPart, 3), 'f')
ds[()] = v
ds = grp.create_dataset('Masses', (numPart,1), 'f')
ds[()] = m
ds = grp.create_dataset('SmoothingLength', (numPart,1), 'f')
ds[()] = h
ds = grp.create_dataset('InternalEnergy', (numPart,1), 'f')
ds[()] = u
ds = grp.create_dataset('ParticleIDs', (numPart,1), 'L')
ds[()] = ids[:]
file.close()
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