MOO.yaml

version: 1.2.0

##########################################################################
# This configuration requires:
# - copying scripts folder to /tmp/data/scripts
# - building and copying the openfoam-paraview.sif container to /tmp/data
# - mkdir -p /tmp/data/trials artifacts
##########################################################################

experiment:
  name: Cavity
  description: Optimization of OpenFOAM's standard cavity tutorial
  parameter_constraints: [] #["lidVelocity <= 20000 * viscosity"] # laminar-only trials
  parameters:
  - name: viscosity
    bounds: [1.0e-7, 1.0e-3]
    parameter_type: float
  - name: lidVelocity
    bounds: [1.0e-3, 2.0]
    parameter_type: float
  - name: inflowPerturbationAmplitude
    bounds: [0.0, 0.03] # fraction of lidVelocity
    parameter_type: float
  - name: inflowPerturbationSpatialMode
    bounds: [3, 8]
    parameter_type: int
  - name: meshResolution
    bounds: [2, 8]
    step_size: 1
    parameter_type: int
  - name: meshCFL
    bounds: [0.5, 1.0]
    parameter_type: float
  - name: pLinearSolver
    values: ["FPCG", "PBiCGStab", "PCG", "PPCG", "PPCR"]
    parameter_type: str
  - name: pPreconditioner
    values: ["DIC", "FDIC", "diagonal", "distributedDIC", "none"]
    parameter_type: str
  - name: pTolerance
    bounds: [1.0e-6, 1.0e-4]
    scaling: log
    parameter_type: float
  - name: pRelTolerance
    bounds: [0.01, 0.1]
    scaling: log
    parameter_type: float
  - name: UTolerance
    bounds: [1.0e-5, 1.0e-3]
    scaling: log
    parameter_type: float

trial_generation:
  method: fast

existing_trials:
  file_path: ''

baseline:
  parameters:
    viscosity: 0.01
    lidVelocity: 1.0
    inflowPerturbationAmplitude: 0
    inflowPerturbationSpatialMode: 2
    meshResolution: 2
    meshCFL: 0.5
    pLinearSolver: PCG
    pPreconditioner: DIC
    pTolerance: 1.0e-6
    pRelTolerance: 0.05
    UTolerance: 1.0e-5

optimization:
  metrics:
  - name: continuityErrors
    command: [ "/tmp/data/scripts/metric.sh", "local", "continuityErrors" ]
    progress: [ "/tmp/data/scripts/metric.sh", "local", "continuityErrors" ]
    lower_is_better: True
  - name: executionTime
    command: [ "/tmp/data/scripts/metric.sh", "local", "executionTime" ]
    progress: [ "/tmp/data/scripts/metric.sh", "local", "executionTime" ]
  - name: wallShearStress
    command: [ "/tmp/data/scripts/metric.sh", "local", "wallShearStress" ]
    progress: [] # no progress because the case only writes the last timestep
  - name: enstrophy
    command: [ "/tmp/data/scripts/metric.sh", "local", "enstrophy" ]
    progress: [] # no progress because the case only writes the last timestep
  objective: "enstrophy, -wallShearStress, -executionTime"
  outcome_constraints: 
  - "enstrophy >= 1.1*baseline"
  - "wallShearStress <= 1.1*baseline"
  - "executionTime <= 5"
  case_runner:
    template_case: ./cavity
    mode: remote # or: local
    log_runner: False # active only when mode=local
    runner: "/tmp/data/scripts/run_on_cluster.sh" # or: ./Allrun /tmp/data/openfoam-paraview.sif
    remote_status_query: "/tmp/data/scripts/state_on_cluster.sh" # optional, only if mode=remote
    remote_early_stop: "docker exec slurm-head scancel --name $CASE_NAME" # also optional
    trial_destination: /tmp/data/trials
    artifacts_folder: ./artifacts
    file_substitution: []
    variable_substitution:
    - file: /0.orig/U
      parameter_scopes:
        lidVelocity: boundaryField.movingWall.codeContext.lidVelocity
        inflowPerturbationAmplitude: boundaryField.movingWall.codeContext.inflowPerturbationAmplitude
        inflowPerturbationSpatialMode: boundaryField.movingWall.codeContext.inflowPerturbationSpatialMode
    - file: /constant/transportProperties
      parameter_scopes:
        viscosity: nu
    - file: /system/fvSolution
      parameter_scopes:
        pLinearSolver: solvers.p.solver
        pPreconditioner: solvers.p.preconditioner
        pTolerance: solvers.p.tolerance
        pRelTolerance: solvers.p.relTolerance
        UTolerance: solvers.U.tolerance
    - file: /system/blockMeshDict
      parameter_scopes:
        meshResolution: meshResolution
    - file: /system/controlDict
      parameter_scopes:
        meshCFL: maxCo

orchestration_settings:
  max_trials: 70
  parallelism: 4
  tolerated_trial_failure_rate: 0.5
  initial_seconds_between_polls: 10
  seconds_between_polls_backoff_factor: 1.0
  timeout_hours: 24
  ttl_seconds_for_trials: 600
  global_stopping_strategy:
    improvement_bar: 0.4
    min_trials: 30
    window_size: 10
  early_stopping_strategy:
    type: or
    left: # early-stops whose continuity errors are worse than 25% of trials at a given step
      type: percentile
      metric_names: [ "continuityErrors" ]
      min_progression: 2
      percentile_threshold: 25
      trial_indices_to_ignore: !range [0, 30]
    right:
      type: percentile
      metric_names: [ "executionTime" ]
      min_progression: 2
      percentile_threshold: 20
      trial_indices_to_ignore: !range [0, 30]

store:
  read_from: nowhere
  save_to: json
  backend_options:
    url: null