############################################################################### # 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 . # ############################################################################## import h5py from numpy import * # Generates a swift IC file for the Sedov blast test in a periodic cubic box # Parameters gamma = 5.0 / 3.0 # Gas adiabatic index n0 = 0.1 # cm^-3 mp = 1.67e-24 # g kB = 1.381e-16 # erg K^-1 pc = 3.086e18 # cm rho0 = n0 * mp # Background density T0 = 1.0e4 # Background pressure E0 = 1.0e51 # Energy of the explosion N_inject = 32 # Number of particles in which to inject energy L = 256.0 * pc fileName = "sedov.hdf5" print(rho0, "cm s^-3") uL = 1.0e3 * pc uM = 1.99e30 uv = 1.0e10 ut = uL / uv uU = uv ** 2 print("ut:", ut / 3.154e7, "yr") # --------------------------------------------------- glass = h5py.File("glassCube_64.hdf5", "r") # Read particle positions and h from the glass pos = glass["/PartType0/Coordinates"][:, :] h = glass["/PartType0/SmoothingLength"][:] pos *= L h *= L for i in range(3): pos[pos[:, i] < 0.0, i] += L pos[pos[:, i] >= L, i] -= L numPart = size(h) # newpos = zeros((numPart*8,3)) # newh = zeros(numPart*8) # for ix in range(2): # for iy in range(2): # for iz in range(2): # offset = ix*4+iy*2+iz # newpos[offset*numPart:(offset+1)*numPart,:] = 0.5*pos[:,:] # newpos[offset*numPart:(offset+1)*numPart,0] += 0.5*ix*L # newpos[offset*numPart:(offset+1)*numPart,1] += 0.5*iy*L # newpos[offset*numPart:(offset+1)*numPart,2] += 0.5*iz*L # newh[offset*numPart:(offset+1)*numPart] = 0.5*h[:] # pos = newpos # h = newh print(h, h.min(), h.max()) numPart = size(h) vol = L ** 3 # Generate extra arrays v = zeros((numPart, 3)) ids = linspace(1, numPart, numPart) m = zeros(numPart) u = zeros(numPart) r = zeros(numPart) r = sqrt( (pos[:, 0] - 0.5 * L) ** 2 + (pos[:, 1] - 0.5 * L) ** 2 + (pos[:, 2] - 0.5 * L) ** 2 ) m[:] = rho0 * vol / numPart # u[:] = P0 / (rho0 * (gamma - 1)) u[:] = kB * T0 / ((gamma - 1.0) * mp) print(u.mean(), E0 / (N_inject * m[0])) print(E0 / (N_inject * m[0]) / u.mean()) # Make the central particle detonate index = argsort(r) u[index[0:N_inject]] = E0 / (N_inject * m[0]) pos /= uL h /= uL L /= uL m /= uM u /= uU print("L:", L) print("m:", m.mean()) print("h:", h.mean()) print("u:", u.mean(), u.min(), u.max()) print("pos:", pos.min(), pos.max()) # -------------------------------------------------- # File file = h5py.File(fileName, "w") # Header grp = file.create_group("/Header") grp.attrs["BoxSize"] = [L, L, L] 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"] = 3 # Units grp = file.create_group("/Units") grp.attrs["Unit length in cgs (U_L)"] = uL grp.attrs["Unit mass in cgs (U_M)"] = uM grp.attrs["Unit time in cgs (U_t)"] = ut grp.attrs["Unit current in cgs (U_I)"] = 1.0 grp.attrs["Unit temperature in cgs (U_T)"] = 1.0 # 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()