small_cosmo_volume.yml 3 KB
Newer Older
1
2
# Define the system of units to use internally. 
InternalUnitSystem:
3
4
5
  UnitMass_in_cgs:     1.98848e43    # 10^10 M_sun
  UnitLength_in_cgs:   3.08567758e24 # 1 Mpc
  UnitVelocity_in_cgs: 1e5           # 1 km/s
6
7
  UnitCurrent_in_cgs:  1             # Amperes
  UnitTemp_in_cgs:     1             # Kelvin
8

9
Cosmology:                      # WMAP9 cosmology
10
11
12
13
  Omega_m:        0.276
  Omega_lambda:   0.724
  Omega_b:        0.0455
  h:              0.703
14
15
  a_begin:        0.019607843	# z_ini = 50.
  a_end:          1.0		# z_end = 0.
16
17
18
19
20
21
22
23
24
25

# 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           
26
27
28
  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
29
30
31
32

# Parameters of the hydro scheme
SPH:
  resolution_eta:      1.2348   # "48 Ngb" with the cubic spline kernel
33
  h_min_ratio:         0.1
34
35
36
37
  CFL_condition:       0.1
  initial_temperature: 7075.    # (1 + z_ini)^2 * 2.72K
  minimal_temperature: 100.

38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
# 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
56
  periodic:                    1
57
58
  cleanup_h_factors:           1    
  cleanup_velocity_factors:    1  
59
60
  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.
61
62
63
64
65
66
67
68
69
70
71
72

# Parameters for the EAGLE "equation of state"
EAGLEEntropyFloor:
  Jeans_density_threshold_H_p_cm3: 0.1       # Physical density above which the EAGLE Jeans limiter entropy floor kicks in expressed in Hydrogen atoms per cm^3.
  Jeans_over_density_threshold:    10.       # Overdensity above which the EAGLE Jeans limiter entropy floor can kick in.
  Jeans_temperature_norm_K:        8000      # Temperature of the EAGLE Jeans limiter entropy floor at the density threshold expressed in Kelvin.
  Jeans_gamma_effective:           1.3333333 # Slope the of the EAGLE Jeans limiter entropy floor
  Cool_density_threshold_H_p_cm3: 1e-5       # Physical density above which the EAGLE Cool limiter entropy floor kicks in expressed in Hydrogen atoms per cm^3.
  Cool_over_density_threshold:    10.        # Overdensity above which the EAGLE Cool limiter entropy floor can kick in.
  Cool_temperature_norm_K:        8000       # Temperature of the EAGLE Cool limiter entropy floor at the density threshold expressed in Kelvin.
  Cool_gamma_effective:           1.         # Slope the of the EAGLE Cool limiter entropy floor