def glass(N, target_rms=0.05):
"""
make glass for initial condition generation
"""
if target_rms < 0.001:
print "warning: target_rms highly unlikely to succeed"
L=1| nbody_system.length
dt=0.01 | nbody_system.time
x,y,z=uniform_random_unit_cube(N).make_xyz()
vx,vy,vz=uniform_unit_sphere(N).make_xyz()
p=datamodel.Particles(N)
p.x=L*x
p.y=L*y
p.z=L*z
p.h_smooth=0. * L
p.vx= 0.1*vx | (nbody_system.speed)
p.vy= 0.1*vy | (nbody_system.speed)
p.vz= 0.1*vz | (nbody_system.speed)
p.u= (0.1*0.1) | nbody_system.speed**2
p.mass=(8./N) | nbody_system.mass
sph=Fi(use_gl=False,mode='periodic',redirection='none')
sph.initialize_code()
sph.parameters.use_hydro_flag=True
sph.parameters.radiation_flag=False
sph.parameters.self_gravity_flag=False
sph.parameters.gamma=1
sph.parameters.isothermal_flag=True
sph.parameters.integrate_entropy_flag=False
sph.parameters.timestep=dt
sph.parameters.verbosity=0
sph.parameters.pboxsize=2*L
sph.parameters.artificial_viscosity_alpha = 1.
sph.parameters.beta = 2.
sph.commit_parameters()
sph.gas_particles.add_particles(p)
sph.commit_particles()
# sph.start_viewer()
t=0. | nbody_system.time
rms=1.
i=0
while rms > target_rms:
t=t+(0.25 | nbody_system.time)
sph.evolve_model(t)
h=sph.particles.h_smooth.value_in(nbody_system.length)
rho=h**(-3.)
rms=rho.std()/rho.mean()
print rms, target_rms
x=sph.particles.x.value_in(nbody_system.length)
y=sph.particles.y.value_in(nbody_system.length)
z=sph.particles.z.value_in(nbody_system.length)
sph.stop()
return x,y,z
def glass(N, target_rms=0.05):
"""
make glass for initial condition generation
"""
if target_rms < 0.001:
print "warning: target_rms highly unlikely to succeed"
L = 1 | nbody_system.length
dt = 0.01 | nbody_system.time
x, y, z = uniform_random_unit_cube(N).make_xyz()
vx, vy, vz = uniform_unit_sphere(N).make_xyz()
p = datamodel.Particles(N)
p.x = L * x
p.y = L * y
p.z = L * z
p.h_smooth = 0. * L
p.vx = 0.1 * vx | (nbody_system.speed)
p.vy = 0.1 * vy | (nbody_system.speed)
p.vz = 0.1 * vz | (nbody_system.speed)
p.u = (0.1 * 0.1) | nbody_system.speed**2
p.mass = (8. / N) | nbody_system.mass
sph = Fi(use_gl=False, mode='periodic', redirection='none')
sph.initialize_code()
sph.parameters.use_hydro_flag = True
sph.parameters.radiation_flag = False
sph.parameters.self_gravity_flag = False
sph.parameters.gamma = 1
sph.parameters.isothermal_flag = True
sph.parameters.integrate_entropy_flag = False
sph.parameters.timestep = dt
sph.parameters.verbosity = 0
sph.parameters.pboxsize = 2 * L
sph.parameters.artificial_viscosity_alpha = 1.
sph.parameters.beta = 2.
sph.commit_parameters()
sph.gas_particles.add_particles(p)
sph.commit_particles()
# sph.start_viewer()
t = 0. | nbody_system.time
rms = 1.
# i = 0
while rms > target_rms:
t = t + (0.25 | nbody_system.time)
sph.evolve_model(t)
h = sph.particles.h_smooth.value_in(nbody_system.length)
rho = h**(-3.)
rms = rho.std() / rho.mean()
print rms, target_rms
x = sph.particles.x.value_in(nbody_system.length)
y = sph.particles.y.value_in(nbody_system.length)
z = sph.particles.z.value_in(nbody_system.length)
sph.stop()
return x, y, z
def iliev_test_5( N=10000,
Ns=10,
L=15. | units.kpc,
dt=None):
"""
prepare iliev test and return SPH and simplex interfaces
"""
gas,sources=iliev_test_5_ic(N,Ns,L)
conv=nbody_system.nbody_to_si(1.0e9 | units.MSun, 1.0 | units.kpc)
sph=Fi(conv,use_gl=False,mode='periodic',redirection='none')
sph.initialize_code()
sph.parameters.use_hydro_flag=True
sph.parameters.radiation_flag=False
sph.parameters.self_gravity_flag=False
sph.parameters.gamma=1
sph.parameters.isothermal_flag=True
sph.parameters.integrate_entropy_flag=False
sph.parameters.timestep=dt
sph.parameters.verbosity=0
sph.parameters.pboxsize=2*L
sph.commit_parameters()
sph.gas_particles.add_particles(gas)
sph.commit_particles()
# sph.start_viewer()
rad=SimpleX(number_of_workers = 1,redirection='none')
rad.initialize_code()
rad.parameters.box_size=2*L
rad.parameters.hilbert_order=0
rad.commit_parameters()
gas.add_particles(sources)
rad.particles.add_particles(gas)
rad.commit_particles()
return sph,rad
def iliev_test_5(N=10000, Ns=10, L=15. | units.kpc, dt=None):
"""
prepare iliev test and return SPH and simplex interfaces
"""
gas, sources = iliev_test_5_ic(N, Ns, L)
conv = nbody_system.nbody_to_si(1.0e9 | units.MSun, 1.0 | units.kpc)
sph = Fi(conv, use_gl=False, mode='periodic', redirection='none')
sph.initialize_code()
sph.parameters.use_hydro_flag = True
sph.parameters.radiation_flag = False
sph.parameters.self_gravity_flag = False
sph.parameters.gamma = 1
sph.parameters.isothermal_flag = True
sph.parameters.integrate_entropy_flag = False
sph.parameters.timestep = dt
sph.parameters.verbosity = 0
sph.parameters.pboxsize = 2 * L
sph.commit_parameters()
sph.gas_particles.add_particles(gas)
sph.commit_particles()
# sph.start_viewer()
rad = SimpleX(number_of_workers=1, redirection='none')
rad.initialize_code()
rad.parameters.box_size = 2 * L
rad.parameters.hilbert_order = 0
rad.commit_parameters()
gas.add_particles(sources)
rad.particles.add_particles(gas)
rad.commit_particles()
return sph, rad
def make_xyz(self):
from amuse.community.fi.interface import Fi
N = self.targetN
target_rms = self.target_rms
L = 1 | nbody_system.length
dt = 0.01 | nbody_system.time
x, y, z = uniform_random_unit_cube(N).make_xyz()
vx, vy, vz = uniform_unit_sphere(N).make_xyz()
p = Particles(N)
p.x = L * x
p.y = L * y
p.z = L * z
p.h_smooth = 0. * L
p.vx = 0.1 * vx | (nbody_system.speed)
p.vy = 0.1 * vy | (nbody_system.speed)
p.vz = 0.1 * vz | (nbody_system.speed)
p.u = (0.1 * 0.1) | nbody_system.speed**2
p.mass = (8. / N) | nbody_system.mass
sph = Fi(use_gl=False, mode='periodic', redirection='none')
sph.initialize_code()
sph.parameters.use_hydro_flag = True
sph.parameters.radiation_flag = False
sph.parameters.self_gravity_flag = False
sph.parameters.gamma = 1.
sph.parameters.isothermal_flag = True
sph.parameters.integrate_entropy_flag = False
sph.parameters.timestep = dt
sph.parameters.verbosity = 0
sph.parameters.periodic_box_size = 2 * L
sph.parameters.artificial_viscosity_alpha = 1.
sph.parameters.beta = 2.
sph.commit_parameters()
sph.gas_particles.add_particles(p)
sph.commit_particles()
# sph.start_viewer()
t = 0. | nbody_system.time
rms = 1.
minrms = 1.
i = 0
while rms > target_rms:
i += 1
t = t + (0.25 | nbody_system.time)
sph.evolve_model(t)
rho = sph.particles.rho.value_in(nbody_system.density)
rms = rho.std() / rho.mean()
minrms = min(minrms, rms)
if rms > 2. * minrms or i > 300:
print " RMS(rho) convergence warning:", i, rms, minrms
if i > 100000:
print "i> 100k steps - not sure about this..."
print " rms:", rms
break
x = sph.particles.x.value_in(nbody_system.length)
y = sph.particles.y.value_in(nbody_system.length)
z = sph.particles.z.value_in(nbody_system.length)
del sph
return x, y, z
def glass(self):
from amuse.community.fi.interface import Fi
if self.target_rms < 0.0001:
print "warning: target_rms may not succeed"
if self.number_of_particles < 1000:
print "warning: not enough particles"
N = 2 * self.number_of_particles
L = 1 | nbody_system.length
dt = 0.01 | nbody_system.time
x, y, z = self._random_cube(N)
vx,vy,vz= self.random(N)
p = Particles(N)
p.x = L * x
p.y = L * y
p.z = L * z
p.h_smooth = 0.0 | nbody_system.length
p.vx = (0.1 | nbody_system.speed) * vx
p.vy = (0.1 | nbody_system.speed) * vy
p.vz = (0.1 | nbody_system.speed) * vz
p.u = (0.1*0.1) | nbody_system.speed**2
p.mass = (8.0/N) | nbody_system.mass
sph = Fi(mode = 'periodic', redirection = 'none')
sph.initialize_code()
sph.parameters.use_hydro_flag = True
sph.parameters.radiation_flag = False
sph.parameters.self_gravity_flag = False
sph.parameters.gamma = 1.0
sph.parameters.isothermal_flag = True
sph.parameters.integrate_entropy_flag = False
sph.parameters.timestep = dt
sph.parameters.verbosity = 0
sph.parameters.periodic_box_size = 2 * L
sph.parameters.artificial_viscosity_alpha = 1.0
sph.parameters.beta = 2.0
sph.commit_parameters()
sph.gas_particles.add_particles(p)
sph.commit_particles()
t = 0.0 | nbody_system.time
rms = 1.0
minrms = 1.0
i = 0
while rms > self.target_rms:
i += 1
t += (0.25 | nbody_system.time)
sph.evolve_model(t)
rho = sph.particles.rho.value_in(nbody_system.density)
rms = rho.std()/rho.mean()
minrms = min(minrms, rms)
if (rms > 2.0*minrms) or (i > 300):
print " RMS(rho) convergence warning:", i, rms, minrms
if i > 100000:
print "i> 100k steps - not sure about this..."
print " rms:", rms
break
x = sph.particles.x.value_in(nbody_system.length)
y = sph.particles.y.value_in(nbody_system.length)
z = sph.particles.z.value_in(nbody_system.length)
sph.stop()
del sph
return self._cutout_sphere(x, y, z)
def glass(self):
from amuse.community.fi.interface import Fi
if self.target_rms < 0.0001:
print("warning: target_rms may not succeed")
if self.number_of_particles < 1000:
print("warning: not enough particles")
N = 2 * self.number_of_particles
L = 1 | nbody_system.length
dt = 0.01 | nbody_system.time
x, y, z = self._random_cube(N)
vx,vy,vz= self.random(N)
p = Particles(N)
p.x = L * x
p.y = L * y
p.z = L * z
p.h_smooth = 0.0 | nbody_system.length
p.vx = (0.1 | nbody_system.speed) * vx[:N]
p.vy = (0.1 | nbody_system.speed) * vy[:N]
p.vz = (0.1 | nbody_system.speed) * vz[:N]
p.u = (0.1*0.1) | nbody_system.speed**2
p.mass = (8.0/N) | nbody_system.mass
sph = Fi(mode = 'periodic', redirection = 'none')
sph.initialize_code()
sph.parameters.use_hydro_flag = True
sph.parameters.radiation_flag = False
sph.parameters.self_gravity_flag = False
sph.parameters.gamma = 1.0
sph.parameters.isothermal_flag = True
sph.parameters.integrate_entropy_flag = False
sph.parameters.timestep = dt
sph.parameters.verbosity = 0
sph.parameters.periodic_box_size = 2 * L
sph.parameters.artificial_viscosity_alpha = 1.0
sph.parameters.beta = 2.0
sph.commit_parameters()
sph.gas_particles.add_particles(p)
sph.commit_particles()
t = 0.0 | nbody_system.time
rms = 1.0
minrms = 1.0
i = 0
while rms > self.target_rms:
i += 1
t += (0.25 | nbody_system.time)
sph.evolve_model(t)
rho = sph.particles.rho.value_in(nbody_system.density)
rms = rho.std()/rho.mean()
minrms = min(minrms, rms)
if (rms > 2.0*minrms) or (i > 300):
print(" RMS(rho) convergence warning:", i, rms, minrms)
if i > 100000:
print("i> 100k steps - not sure about this...")
print(" rms:", rms)
break
x = sph.particles.x.value_in(nbody_system.length)
y = sph.particles.y.value_in(nbody_system.length)
z = sph.particles.z.value_in(nbody_system.length)
sph.stop()
del sph
return self._cutout_sphere(x, y, z)
def make_xyz(self):
from amuse.community.fi.interface import Fi
N=self.targetN
target_rms=self.target_rms
L=1| nbody_system.length
dt=0.01 | nbody_system.time
x,y,z=uniform_random_unit_cube(N).make_xyz()
vx,vy,vz=uniform_unit_sphere(N).make_xyz()
p=Particles(N)
p.x=L*x
p.y=L*y
p.z=L*z
p.h_smooth=0. * L
p.vx= 0.1*vx | (nbody_system.speed)
p.vy= 0.1*vy | (nbody_system.speed)
p.vz= 0.1*vz | (nbody_system.speed)
p.u= (0.1*0.1) | nbody_system.speed**2
p.mass=(8./N) | nbody_system.mass
sph=Fi(use_gl=False,mode='periodic',redirection='none')
sph.initialize_code()
sph.parameters.use_hydro_flag=True
sph.parameters.radiation_flag=False
sph.parameters.self_gravity_flag=False
sph.parameters.gamma=1.
sph.parameters.isothermal_flag=True
sph.parameters.integrate_entropy_flag=False
sph.parameters.timestep=dt
sph.parameters.verbosity=0
sph.parameters.periodic_box_size=2*L
sph.parameters.artificial_viscosity_alpha = 1.
sph.parameters.beta = 2.
sph.commit_parameters()
sph.gas_particles.add_particles(p)
sph.commit_particles()
# sph.start_viewer()
t=0. | nbody_system.time
rms=1.
minrms=1.
i=0
while rms > target_rms:
i+=1
t=t+(0.25 | nbody_system.time)
sph.evolve_model(t)
rho=sph.particles.rho.value_in(nbody_system.density)
rms=rho.std()/rho.mean()
minrms=min(minrms,rms)
if rms>2.*minrms or i>300:
print " RMS(rho) convergence warning:", i, rms,minrms
if i>100000:
print "i> 100k steps - not sure about this..."
print " rms:", rms
break
x=sph.particles.x.value_in(nbody_system.length)
y=sph.particles.y.value_in(nbody_system.length)
z=sph.particles.z.value_in(nbody_system.length)
del sph
return x,y,z
