cooling_halo.yml 2.56 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
# Define the system of units to use internally. 
InternalUnitSystem:
  UnitMass_in_cgs:     1.9885e39     # 10^6 solar masses
  UnitLength_in_cgs:   3.0856776e21  # Kiloparsecs
  UnitVelocity_in_cgs: 1e5           # Kilometres per second
  UnitCurrent_in_cgs:  1   # Amperes
  UnitTemp_in_cgs:     1   # Kelvin

# Parameters governing the time integration
TimeIntegration:
  time_begin: 0.    # The starting time of the simulation (in internal units).
  time_end:   10.    # The end time of the simulation (in internal units).
  dt_min:     1e-4  # The minimal time-step size of the simulation (in internal units).
  dt_max:     1e-1  # The maximal time-step size of the simulation (in internal units).

# Parameters governing the conserved quantities statistics
Statistics:
  delta_time:          1e-2 # Time between statistics output
  
# Parameters governing the snapshots
Snapshots:
  basename:            CoolingHalo  # Common part of the name of output files
  time_first:          0.               # Time of the first output (in internal units)
  delta_time:          0.1             # Time difference between consecutive outputs (in internal units)

# Parameters for the hydrodynamics scheme
SPH:
  resolution_eta:        1.2349   # Target smoothing length in units of the mean inter-particle separation (1.2349 == 48Ngbs with the cubic spline kernel).
  delta_neighbours:      1.       # The tolerance for the targetted number of neighbours.
  CFL_condition:         0.1      # Courant-Friedrich-Levy condition for time integration.

# Parameters related to the initial conditions
InitialConditions:
  file_name:  CoolingHalo.hdf5       # The file to read
  shift_x:    0.                  # A shift to apply to all particles read from the ICs (in internal units).
  shift_y:    0.
  shift_z:    0.
 
# External potential parameters
SoftenedIsothermalPotential:
  position_x:      0.     # location of centre of isothermal potential in internal units
  position_y:      0.
  position_z:      0.	
  vrot:            200.     # rotation speed of isothermal potential in internal units
  timestep_mult:   0.03     # controls time step
  epsilon:         0.1    #softening for the isothermal potential

# Cooling parameters
LambdaCooling:
  lambda_cgs:                  1.0e-22    # Cooling rate (in cgs units)
  minimum_temperature:         1.0e4  # Minimal temperature (Kelvin)
  mean_molecular_weight:       0.59   # Mean molecular weight
  hydrogen_mass_abundance:     0.75   # Hydrogen mass abundance (dimensionless)
  cooling_tstep_mult:          1.0    # Dimensionless pre-factor for the time-step condition