parameter_example.yml

# Define the system of units to use internally.
InternalUnitSystem:
  UnitMass_in_cgs:     1   # Grams
  UnitLength_in_cgs:   1   # Centimeters
  UnitVelocity_in_cgs: 1   # Centimeters per second
  UnitCurrent_in_cgs:  1   # Amperes
  UnitTemp_in_cgs:     1   # Kelvin

# Parameters for the task scheduling
Scheduler:
  nr_queues:              0         # (Optional) The number of task queues to use. Use 0  to let the system decide.
  cell_max_size:          8000000   # (Optional) Maximal number of interactions per task if we force the split (this is the default value).
  cell_sub_size_pair:     256000000 # (Optional) Maximal number of interactions per sub-pair task  (this is the default value).
  cell_sub_size_self:     32000     # (Optional) Maximal number of interactions per sub-self task  (this is the default value).
  cell_split_size:        400       # (Optional) Maximal number of particles per cell (this is the default value).
  max_top_level_cells:    12        # (Optional) Maximal number of top-level cells in any dimension. The number of top-level cells will be the cube of this (this is the default value).
  tasks_per_cell:         0         # (Optional) The average number of tasks per cell. If not large enough the simulation will fail (means guess...).

# Parameters governing the time integration (Set dt_min and dt_max to the same value for a fixed time-step run.)
TimeIntegration:
  time_begin: 0.    # The starting time of the simulation (in internal units).
  time_end:   1.    # The end time of the simulation (in internal units).
  dt_min:     1e-6  # The minimal time-step size of the simulation (in internal units).
  dt_max:     1e-2  # The maximal time-step size of the simulation (in internal units).

# Parameters governing the snapshots
Snapshots:
  basename:   output      # Common part of the name of output files
  time_first: 0.          # Time of the first output (in internal units)
  delta_time: 0.01        # Time difference between consecutive outputs (in internal units)
  compression: 0          # (Optional) Set the level of compression of the HDF5 datasets [0-9]. 0 does no compression.
  UnitMass_in_cgs:     1  # (Optional) Unit system for the outputs (Grams)
  UnitLength_in_cgs:   1  # (Optional) Unit system for the outputs (Centimeters)
  UnitVelocity_in_cgs: 1  # (Optional) Unit system for the outputs (Centimeters per second)
  UnitCurrent_in_cgs:  1  # (Optional) Unit system for the outputs (Amperes)
  UnitTemp_in_cgs:     1  # (Optional) Unit system for the outputs (Kelvin)

# Parameters governing the conserved quantities statistics
Statistics:
  delta_time:          1e-2      # Time between statistics output
  energy_file_name:    energy    # (Optional) File name for energy output
  timestep_file_name:  timesteps # (Optional) File name for timing information output. Note: No underscores "_" allowed in file name

# Parameters for the hydrodynamics scheme
SPH:
  resolution_eta:        1.2348   # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
  CFL_condition:         0.1      # Courant-Friedrich-Levy condition for time integration.
  h_tolerance:           1e-4     # (Optional) Relative accuracy of the Netwon-Raphson scheme for the smoothing lengths.
  h_max:                 10.      # (Optional) Maximal allowed smoothing length in internal units. Defaults to FLT_MAX if unspecified.
  max_volume_change:     1.4      # (Optional) Maximal allowed change of kernel volume over one time-step.
  max_ghost_iterations:  30       # (Optional) Maximal number of iterations allowed to converge towards the smoothing length.

EoS:
  isothermal_internal_energy: 20.26784 # Thermal energy per unit mass for the case of isothermal equation of state (in internal units).

# Parameters for the self-gravity scheme
Gravity:
  eta:          0.025    # Constant dimensionless multiplier for time integration.
  theta:        0.7      # Opening angle (Multipole acceptance criterion)
  epsilon:      0.1      # Softening length (in internal units).
  a_smooth:     1.25     # (Optional) Smoothing scale in top-level cell sizes to smooth the long-range forces over (this is the default value).
  r_cut_max:    4.5      # (Optional) Cut-off in number of top-level cells beyond which no FMM forces are computed (this is the default value).
  r_cut_min:    0.1      # (Optional) Cut-off in number of top-level cells below which no truncation of FMM forces are performed (this is the default value).

# Parameters related to the initial conditions
InitialConditions:
  file_name:  SedovBlast/sedov.hdf5 # The file to read
  cleanup_h:   0                    # (Optional) Clean the values of h that are read in. Set to 1 to activate.
  h_scaling:  1.                    # (Optional) A scaling factor to apply to all smoothing lengths in the ICs.
  shift_x:    0.                    # (Optional) A shift to apply to all particles read from the ICs (in internal units).