Exemple #1
0
def main(N=1000, Lstar=100| units.LSun, boxsize=10| units.parsec, 
         rho=1.0| (units.amu/units.cm**3), t_end=0.1|units.Myr, n_steps=10):

    ionization_fraction = 0.0
    internal_energy = (9. |units.kms)**2

    source=Particles(1)
    source.position = (0, 0, 0) |units.parsec
    source.flux = Lstar/(20. | units.eV)
    source.luminosity = Lstar/(20. | units.eV)
    source.rho = rho
    source.xion = ionization_fraction
    source.u = internal_energy

    converter=nbody_system.nbody_to_si(1|units.MSun, boxsize)
    ism = ProtoPlanetaryDisk(N, convert_nbody=converter, 
                                densitypower=1.5, 
                                Rmin=0.1, 
                                Rmax=1,
                                q_out=1.0,
                                discfraction=1.0).result
    ism = ism.select(lambda r: r.length()<0.5*boxsize,["position"])
    gamma=5./3.
    mu=1.| units.amu
    Tinit = 10000|units.K
    ism.u = 1/(gamma-1)*constants.kB * Tinit/mu
    ism.rho = rho
    ism.flux = 0. | units.s**-1
    ism.xion = ionization_fraction 
    ism.h_smooth = 0 | units.AU

    rad = SimpleXSplitSet(redirect="none")
#    rad = SimpleX()
#    rad = SPHRay()
    rad.parameters.box_size=1.001*boxsize    
    rad.parameters.timestep=0.001 | units.Myr

    rad.src_particles.add_particle(source)
    rad.gas_particles.add_particles(ism)

    channel_to_local_gas = rad.gas_particles.new_channel_to(ism)
    write_set_to_file(ism, "rad.hdf5", 'hdf5')

    time = 0.0 | t_end.unit
    dt = t_end/float(n_steps)
    while time<t_end:
        time += dt
        rad.evolve_model(time)
        channel_to_local_gas.copy_attributes(["xion",])
        write_set_to_file(ism, "rad.hdf5", 'hdf5')

        print "Time=", time
        print "min ionization:", rad.gas_particles.xion.min()
        print "average Xion:", rad.gas_particles.xion.mean()
        print "max ionization:", rad.gas_particles.xion.max()
    rad.stop()
def main(Ndisk, Mstar, Mdisk, Rin, Rout, t_end, Nray, x, y, z):

    time = 0 | units.Myr
    supernova_IIp = Supernova_IIp(10|units.day)
    
    efficiency_factor = 0.1
    Rsn = efficiency_factor * (x**2 + y**2 + z**2)**0.5

    supernova=Particle()
    supernova.position = (x.value_in(units.parsec),
                          y.value_in(units.parsec),
                          z.value_in(units.parsec)) |units.parsec
    supernova.position *= efficiency_factor
    supernova.luminosity = efficiency_factor**2 * supernova_IIp.luminosity_at_time(time)/(20.|units.eV)
#    supernova.flux = supernova.luminosity
    supernova.xion = 0.0
    supernova.u = (10**51 | units.erg)/(10|units.MSun)
    
    stellar = SeBa()
    star = Particle()
    star.mass = Mstar
    star.position = (0,0,0) | units.AU
    star.velocity = (0,0,0) | units.kms
    stellar.particles.add_particle(star)
    stellar.evolve_model(1|units.Myr)
    star.luminosity = stellar.particles[0].luminosity/(20. | units.eV)
    star.temperature = stellar.particles[0].temperature
    stellar.stop()
    star.u = (9. |units.kms)**2
    star.xion = 0.0
    print star

    print "M=", Mdisk/Mstar    
    converter=nbody_system.nbody_to_si(Mstar, 1 | units.AU)
    disk = ProtoPlanetaryDisk(Ndisk, convert_nbody=converter,
                              Rmin=Rin.value_in(units.AU), 
                              Rmax=Rout.value_in(units.AU),
                              q_out=25.0, discfraction=Mdisk/Mstar).result
####                              q_out=2.0, discfraction=Mdisk/Mstar).result
    print disk.x.max().in_(units.AU)
    print disk.mass.sum().in_(units.MSun)
    print disk.u.max().in_(units.kms**2)
    print disk.mass.min().in_(units.MSun)
    disk.flux = 0. | units.s**-1
    disk.xion = 0.0

    dt = t_end/1000.
    
    hydro = Fi(converter)
    hydro.parameters.use_hydro_flag=True
    hydro.parameters.radiation_flag=False
    hydro.parameters.self_gravity_flag=True
    
    hydro.parameters.gamma=1.
    hydro.parameters.isothermal_flag=True

# Non-isothermal: lowest temperature remains constat at 20K
#    hydro.parameters.gamma=1.66667
#    hydro.parameters.isothermal_flag=False
    
    hydro.parameters.integrate_entropy_flag=False
    hydro.parameters.timestep=0.5 | units.hour #0.125 | units.day
#    hydro.parameters.verbosity=99
    hydro.parameters.epsilon_squared=0.1 | units.AU**2
    hydro.parameters.courant=0.2    
    hydro.parameters.artificial_viscosity_alpha = 0.1 
    
    hydro.gas_particles.add_particles(disk)
    hydro.dm_particles.add_particle(star)
    hydro_to_disk = hydro.gas_particles.new_channel_to(disk)
    hydro_to_star = hydro.dm_particles.new_channel_to(star.as_set())
    disk_to_hydro = disk.new_channel_to(hydro.gas_particles)
    star_to_hydro = star.as_set().new_channel_to(hydro.dm_particles)
    hydro.evolve_model(1|units.hour)
    hydro_to_disk.copy()
    hydro_to_star.copy()
    
    radiative = SPHRay(redirection="file", number_of_workers=4)#, debugger="gdb")
    radiative.parameters.number_of_rays=Nray/dt
    print dt.in_(units.yr)
    radiative.parameters.default_spectral_type=-3.
    radiative.parameters.box_size=10000. | units.AU
    radiative.parameters.ionization_temperature_solver=2
    print radiative.parameters

#    radiative.src_particles.add_particle(star)
    radiative.src_particles.add_particle(supernova)
    radiative.gas_particles.add_particles(disk)

    gas_to_rad = disk.new_channel_to(radiative.gas_particles)
    rad_to_gas = radiative.gas_particles.new_channel_to(disk)
    
    print "Before"
    print "Luminosity:", radiative.src_particles.luminosity
    print "min ionization:", radiative.gas_particles.xion.min()
    print "average Xion:", radiative.gas_particles.xion.mean()
    print "max ionization:", radiative.gas_particles.xion.max()
    print "min u:", radiative.gas_particles.u.min()
    print "average u:", radiative.gas_particles.u.mean()
    print "max u:", radiative.gas_particles.u.max()

    Tmean = [] | units.K
    Tmin = [] | units.K
    Tmax = [] | units.K
    t = [] | units.day
    while radiative.model_time<t_end:

        supernova = update_source_particle(radiative, time+0.5*dt, supernova, efficiency_factor, supernova_IIp)

        radiative.evolve_model(time+0.5*dt)
        print "RT done at time:", time.in_(units.day)
        rad_to_gas.copy()

        disk_to_hydro.copy()
        star_to_hydro.copy()
        hydro.evolve_model(time + dt)
        hydro_to_disk.copy()
        hydro_to_star.copy()

        supernova = update_source_particle(radiative, time+dt, supernova, efficiency_factor, supernova_IIp)

        radiative.evolve_model(time+dt)
        print "RT done at time:", time.in_(units.day)
        rad_to_gas.copy()

        time += dt
        print_diagnostics(time, supernova, disk)
        
        Temperature =  mu() / constants.kB * disk.u
        t.append(time)
        Tmean.append(Temperature.mean())
        Tmin.append(Temperature.min())
        Tmax.append(Temperature.max())

        #write_set_to_file(disk, "disk_irradiation.amuse", "amuse")
        
        print "timescale:", (disk.mass.sum().value_in(units.amu)/((Rout/Rsn)**2*supernova.luminosity)).in_(units.yr)
        print "scaleheight:", abs(disk.z.value_in(units.AU)).mean()
        
        #pyplot.hist2d(abs(disk.x.value_in(units.AU)), abs(numpy.log10(Temperature.value_in(units.K))), bins=200)
       # pyplot.hist2d(abs(disk.x.value_in(units.AU)), abs(disk.z.value_in(units.AU)), bins=200)
        #,norm=LogNorm())
       #, Temperature.in_(units.K))
#       pyplot.tripcolor(abs(disk.x.value_in(units.AU)), abs(disk.y.value_in(units.AU)), Temperature.in_(units.K))
        #pyplot.hist(abs(disk.x.value_in(units.AU)), 100)
       # pyplot.show()

    print_diagnostics(time, supernova, disk)

    #plot_ionization_fraction(disk.position, disk.xion)
#    plot_ionization_fraction(disk.z, disk.u.value_in(units.kms**2))
#    plot_ionization_fraction(disk.x, disk.u.value_in(units.kms**2))
    radiative.stop()
    plot_temperature(t, Tmin, Tmean, Tmax)
Exemple #3
0
def main(N=1000,
         Lstar=100 | units.LSun,
         boxsize=10 | units.parsec,
         rho=1.0 | (units.amu / units.cm**3),
         t_end=0.1 | units.Myr,
         n_steps=10):

    ionization_fraction = 0.0
    internal_energy = (9. | units.kms)**2

    source = Particles(1)
    source.position = (0, 0, 0) | units.parsec
    source.flux = Lstar / (20. | units.eV)
    source.luminosity = Lstar / (20. | units.eV)
    source.rho = rho
    source.xion = ionization_fraction
    source.u = internal_energy

    converter = nbody_system.nbody_to_si(1 | units.MSun, boxsize)
    ism = ProtoPlanetaryDisk(N,
                             convert_nbody=converter,
                             densitypower=1.5,
                             Rmin=0.1,
                             Rmax=1,
                             q_out=1.0,
                             discfraction=1.0).result
    ism = ism.select(lambda r: r.length() < 0.5 * boxsize, ["position"])
    gamma = 5. / 3.
    mu = 1. | units.amu
    Tinit = 10000 | units.K
    ism.u = 1 / (gamma - 1) * constants.kB * Tinit / mu
    ism.rho = rho
    ism.flux = 0. | units.s**-1
    ism.xion = ionization_fraction
    ism.h_smooth = 0 | units.AU

    rad = SimpleXSplitSet(redirect="none")
    #    rad = SimpleX()
    #    rad = SPHRay()
    rad.parameters.box_size = 1.001 * boxsize
    rad.parameters.timestep = 0.001 | units.Myr

    rad.src_particles.add_particle(source)
    rad.gas_particles.add_particles(ism)

    channel_to_local_gas = rad.gas_particles.new_channel_to(ism)
    write_set_to_file(ism, "rad.hdf5", 'hdf5')

    time = 0.0 | t_end.unit
    dt = t_end / float(n_steps)
    while time < t_end:
        time += dt
        rad.evolve_model(time)
        channel_to_local_gas.copy_attributes([
            "xion",
        ])
        write_set_to_file(ism, "rad.hdf5", 'hdf5')

        print("Time=", time)
        print("min ionization:", rad.gas_particles.xion.min())
        print("average Xion:", rad.gas_particles.xion.mean())
        print("max ionization:", rad.gas_particles.xion.max())
    rad.stop()
def main(Ndisk, Mstar, Mdisk, Rin, Rout, t_end, Nray, x, y, z):

    time = 0 | units.Myr
    supernova_IIp = Supernova_IIp(10|units.day)
    
    efficiency_factor = 0.1
    Rsn = efficiency_factor * (x**2 + y**2 + z**2)**0.5

    supernova = Particle()
    supernova.position = (x.value_in(units.parsec),
                          y.value_in(units.parsec),
                          z.value_in(units.parsec)) |units.parsec
    supernova.position *= efficiency_factor
    supernova_IIp.particles.add_particle(supernova)
    supernova_IIp.evolve_model(time)
    supernova.luminosity = efficiency_factor**2 * supernova.luminosity
    supernova.xion = 0.0
    supernova.u = (10**51 | units.erg)/(10|units.MSun)
    
    stellar = SeBa()
    star = Particle()
    star.mass = Mstar
    star.position = (0,0,0) | units.AU
    star.velocity = (0,0,0) | units.kms
    stellar.particles.add_particle(star)
    stellar.evolve_model(1|units.Myr)
    star.luminosity = stellar.particles[0].luminosity/(20. | units.eV)
    star.temperature = stellar.particles[0].temperature
    stellar.stop()
    star.u = (9. |units.kms)**2
    star.xion = 0.0
    print star

    print "M=", Mdisk/Mstar    
    converter=nbody_system.nbody_to_si(Mstar, 1 | units.AU)
    disk = ProtoPlanetaryDisk(Ndisk, convert_nbody=converter,
                              Rmin=Rin.value_in(units.AU), 
                              Rmax=Rout.value_in(units.AU),
                              q_out=25.0, discfraction=Mdisk/Mstar).result
####                              q_out=2.0, discfraction=Mdisk/Mstar).result
    print disk.x.max().in_(units.AU)
    print disk.mass.sum().in_(units.MSun)
    print disk.u.max().in_(units.kms**2)
    print disk.mass.min().in_(units.MSun)
    disk.flux = 0. | units.s**-1
    disk.xion = 0.0

    dt = t_end/1000.
    
    hydro = Fi(converter)
    hydro.parameters.use_hydro_flag=True
    hydro.parameters.radiation_flag=False
    hydro.parameters.self_gravity_flag=True
    
    hydro.parameters.gamma=1.
    hydro.parameters.isothermal_flag=True

# Non-isothermal: lowest temperature remains constat at 20K
#    hydro.parameters.gamma=1.66667
#    hydro.parameters.isothermal_flag=False
    
    hydro.parameters.integrate_entropy_flag=False
    hydro.parameters.timestep=0.5 | units.hour #0.125 | units.day
#    hydro.parameters.verbosity=99
    hydro.parameters.epsilon_squared=0.1 | units.AU**2
    hydro.parameters.courant=0.2    
    hydro.parameters.artificial_viscosity_alpha = 0.1 
    
    hydro.gas_particles.add_particles(disk)
    hydro.dm_particles.add_particle(star)
    hydro_to_disk = hydro.gas_particles.new_channel_to(disk)
    hydro_to_star = hydro.dm_particles.new_channel_to(star.as_set())
    disk_to_hydro = disk.new_channel_to(hydro.gas_particles)
    star_to_hydro = star.as_set().new_channel_to(hydro.dm_particles)
    hydro.evolve_model(1|units.hour)
    hydro_to_disk.copy()
    hydro_to_star.copy()
    
    radiative = SPHRay(redirection="file",
                       number_of_workers=4)#, debugger="gdb")
    radiative.parameters.number_of_rays=Nray/dt
    print dt.in_(units.yr)
    radiative.parameters.default_spectral_type=-3.
    radiative.parameters.box_size=10000. | units.AU
    radiative.parameters.ionization_temperature_solver=2
    print radiative.parameters

#    radiative.src_particles.add_particle(star)
    radiative.src_particles.add_particle(supernova)
    radiative.gas_particles.add_particles(disk)

    gas_to_rad = disk.new_channel_to(radiative.gas_particles)
    rad_to_gas = radiative.gas_particles.new_channel_to(disk)
    
    print "Before"
    print "Luminosity:", radiative.src_particles.luminosity
    print "min ionization:", radiative.gas_particles.xion.min()
    print "average Xion:", radiative.gas_particles.xion.mean()
    print "max ionization:", radiative.gas_particles.xion.max()
    print "min u:", radiative.gas_particles.u.min()
    print "average u:", radiative.gas_particles.u.mean()
    print "max u:", radiative.gas_particles.u.max()

    Tmean = [] | units.K
    Tmin = [] | units.K
    Tmax = [] | units.K
    t = [] | units.day
    while radiative.model_time<t_end:

        supernova = update_source_particle(radiative, time+0.5*dt, supernova,
                                           efficiency_factor, supernova_IIp)

        radiative.evolve_model(time+0.5*dt)
        print "RT done at time:", time.in_(units.day)
        rad_to_gas.copy()

        disk_to_hydro.copy()
        star_to_hydro.copy()
        hydro.evolve_model(time + dt)
        hydro_to_disk.copy()
        hydro_to_star.copy()

        supernova = update_source_particle(radiative, time+dt, supernova,
                                           efficiency_factor, supernova_IIp)

        radiative.evolve_model(time+dt)
        print "RT done at time:", time.in_(units.day)
        rad_to_gas.copy()

        time += dt
        print_diagnostics(time, supernova, disk)
        
        Temperature =  mu() / constants.kB * disk.u
        t.append(time)
        Tmean.append(Temperature.mean())
        Tmin.append(Temperature.min())
        Tmax.append(Temperature.max())

        #write_set_to_file(disk, "disk_irradiation.amuse", "amuse")
        
        print "timescale:", (disk.mass.sum().value_in(units.amu) \
                              / ((Rout/Rsn)**2*supernova.luminosity)).in_(units.yr)
        print "scaleheight:", abs(disk.z.value_in(units.AU)).mean()
        
        #pyplot.hist2d(abs(disk.x.value_in(units.AU)), abs(numpy.log10(Temperature.value_in(units.K))), bins=200)
       # pyplot.hist2d(abs(disk.x.value_in(units.AU)), abs(disk.z.value_in(units.AU)), bins=200)
        #,norm=LogNorm())
       #, Temperature.in_(units.K))
#       pyplot.tripcolor(abs(disk.x.value_in(units.AU)), abs(disk.y.value_in(units.AU)), Temperature.in_(units.K))
        #pyplot.hist(abs(disk.x.value_in(units.AU)), 100)
       # pyplot.show()

    print_diagnostics(time, supernova, disk)

    #plot_ionization_fraction(disk.position, disk.xion)
#    plot_ionization_fraction(disk.z, disk.u.value_in(units.kms**2))
#    plot_ionization_fraction(disk.x, disk.u.value_in(units.kms**2))
    radiative.stop()
    plot_temperature(t, Tmin, Tmean, Tmax)