Commit 52d397ab authored by Matthieu Schaller's avatar Matthieu Schaller
Browse files

Added the 'Big Pertubed Box' IC script.


Former-commit-id: 6bed5c114ceb1b734638653c9882510798b079fa
parent 60a49236
###############################################################################
# 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 Sedov blast test in a periodic cubic box
# Parameters
periodic= 1 # 1 For periodic box
boxSize = 10.
L = 128 # Number of particles boxes along one axis
rho = 1. # Density
P = 1.e-5 # Pressure
E0= 1.e2 # Energy of the explosion
pert = 0.025
gamma = 5./3. # Gas adiabatic index
fileName = "perturbedBox.hdf5"
#---------------------------------------------------
numPart = 4*(L**3)
mass = boxSize**3 * rho / numPart
internalEnergy = P / ((gamma - 1.)*rho)
off = array( [ [ 0.0 , 0.0 , 0.0 ] , [ 0.0 , 0.5 , 0.5 ] , [ 0.5 , 0.0 , 0.5 ] , [ 0.5 , 0.5 , 0.0 ] ] );
hbox = boxSize / L
# if L%2 == 0:
# print "Number of particles along each dimension must be odd."
# exit()
#Generate particles
coords = zeros((numPart, 3))
v = zeros((numPart, 3))
m = zeros((numPart, 1))
h = zeros((numPart, 1))
u = zeros((numPart, 1))
ids = zeros((numPart, 1), dtype='L')
for i in range(L):
for j in range(L):
for k in range(L):
x = (i + 0.25) * hbox
y = (j + 0.25) * hbox
z = (k + 0.25) * hbox
for ell in range(4):
index = 4*(i*L*L + j*L + k) + ell
coords[index,0] = x + off[ell,0] * hbox
coords[index,1] = y + off[ell,1] * hbox
coords[index,2] = z + off[ell,2] * hbox
v[index,0] = 0.
v[index,1] = 0.
v[index,2] = 0.
m[index] = mass
h[index] = 2.251 / 4 * hbox
u[index] = internalEnergy
ids[index] = index
coords[index,0] += random.random() * pert * hbox
coords[index,1] += random.random() * pert * hbox
coords[index,2] += random.random() * pert * hbox
#--------------------------------------------------
#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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