small_cosmo_volume.yml 2.65 KB
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# Define the system of units to use internally. 
InternalUnitSystem:
  UnitMass_in_cgs:     1.98848e43    # 10^10 M_sun
  UnitLength_in_cgs:   3.08567758e24 # 1 Mpc
  UnitVelocity_in_cgs: 1e5           # 1 km/s
  UnitCurrent_in_cgs:  1             # Amperes
  UnitTemp_in_cgs:     1             # Kelvin

Cosmology:                      # WMAP9 cosmology
  Omega_m:        0.276
  Omega_lambda:   0.724
  Omega_b:        0.0455
  h:              0.703
  a_begin:        0.019607843	# z_ini = 50.
  a_end:          1.0		# z_end = 0.

# Parameters governing the time integration
TimeIntegration:
  dt_min:     1e-6 
  dt_max:     1e-2 

# Parameters for the self-gravity scheme
Gravity:
  eta:          0.025         
  theta:        0.3           
  comoving_softening:     0.0889     # 1/25th of the mean inter-particle separation: 88.9 kpc
  max_physical_softening: 0.0889     # 1/25th of the mean inter-particle separation: 88.9 kpc
  mesh_side_length:       64

# Parameters of the hydro scheme
SPH:
  resolution_eta:      1.2348   # "48 Ngb" with the cubic spline kernel
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  h_min_ratio:         0.1
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  CFL_condition:       0.1
  initial_temperature: 7075.    # (1 + z_ini)^2 * 2.72K
  minimal_temperature: 100.

# Parameters governing the snapshots
Snapshots:
  basename:            snap
  delta_time:          1.02
  scale_factor_first:  0.02
  
# Parameters governing the conserved quantities statistics
Statistics:
  delta_time:          1.02
  scale_factor_first:  0.02
  
Scheduler:
  max_top_level_cells: 8
  cell_split_size:     50
  
# Parameters related to the initial conditions
InitialConditions:
  file_name:  small_cosmo_volume.hdf5
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  periodic:                    1
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  cleanup_h_factors:           1    
  cleanup_velocity_factors:    1  
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  generate_gas_in_ics:         1    # Generate gas particles from the DM-only ICs
  cleanup_smoothing_lengths:   1    # Since we generate gas, make use of the (expensive) cleaning-up procedure.
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# Constant lambda cooling function
LambdaCooling:
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  lambda_nH2_cgs:              1e-26 # Cooling rate divided by square Hydrogen number density (in cgs units [erg * s^-1 * cm^3])
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# EAGLE cooling function
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EAGLECooling:
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  dir_name:                 ./coolingtables/
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  H_reion_z:               11.5
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  He_reion_z_centre:       3.5
  He_reion_z_sigma:        0.5
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  He_reion_eV_p_H:         2.0
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# Impose primoridal metallicity
EAGLEChemistry:
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  init_abundance_metal:     0.0
  init_abundance_Hydrogen:  0.752
  init_abundance_Helium:    0.248
  init_abundance_Carbon:    0.0
  init_abundance_Nitrogen:  0.0
  init_abundance_Oxygen:    0.0
  init_abundance_Neon:      0.0
  init_abundance_Magnesium: 0.0
  init_abundance_Silicon:   0.0
  init_abundance_Iron:      0.0