Example setup for incompressible flow that uses a finite volume solver and checks for simulation restart using output at a specified interval

feFlow/incompressibleFlowRestart.yaml

---
tests:
  # This input file is used for more than one test
  - !IntegrationRestartTest
    # specify the basic test parameters for restart test
    testParameters:
      # a unique test name for this integration tests
      name: incompressibleFlowRestart
      asserts:
        - "inputs/feFlow/incompressibleFlowRestart.txt"
        - !testingResources::asserts::TextFileAssert
          expected: "inputs/feFlow/incompressibleFlowRestartProbe.csv"
          actual: "incompressibleFlowRestartProbe.csv"
    # upon restart, override some of the input parameters
    restartOverrides:
      timestepper::arguments::ts_max_steps: "30"

  - !IntegrationRestartTest
    # specify the basic test parameters for restart test
    testParameters:
      # a unique test name for this integration tests
      name: incompressibleFlowRestart2Ranks
      ranks: 2
      asserts:
        - "inputs/feFlow/incompressibleFlowRestart.txt"
        - !testingResources::asserts::TextFileAssert
          expected: "inputs/feFlow/incompressibleFlowRestartProbe.csv"
          actual: "incompressibleFlowRestartProbe.csv"
    # upon restart, override some of the input parameters
    restartOverrides:
      timestepper::arguments::ts_max_steps: "30"

environment:
  title: incompessibleFlow
  tagDirectory: true
arguments:
  dm_plex_separate_marker: ""
timestepper:
  name: theMainTimeStepper
  io:
    interval: 5
  arguments:
    ts_dt: .1
    ts_max_steps: 15
    ksp_type: fgmres
    ksp_gmres_restart: 10
    ksp_rtol: 1.0e-9
    ksp_atol: 1.0e-14
    ksp_error_if_not_converged: ""
    pc_type: fieldsplit
    pc_fieldsplit_0_fields: 0,2
    pc_fieldsplit_1_fields: 1
    pc_fieldsplit_type: schur
    pc_fieldsplit_schur_factorization_type: "full"
    fieldsplit_0_pc_type: lu
    fieldsplit_pressure_ksp_rtol: 1E-10
    fieldsplit_pressure_pc_type: jacobi
  domain: !ablate::domain::BoxMesh
    name: simpleBoxField
    faces: [ 2, 2 ]
    lower: [ 0, 0 ]
    upper: [ 1, 1 ]
    options:
      dm_distribute: ""
      dm_refine: 2
    fields:
      - !ablate::finiteElement::LowMachFlowFields
  initialization:
    - &velocityField
      fieldName: "velocity"
      field: "t + x^2 + y^2, t + 2*x^2 - 2*x*y"
      timeDerivative: "1.0, 1.0"
    - &pressureField
      fieldName: "pressure"
      field: "x + y - 1"
      timeDerivative: "0.0"
    - &temperatureField
      fieldName: "temperature"
      field: "t + x + y"
      timeDerivative: "1.0"
  exactSolution:
    - *velocityField
    - *pressureField
    - *temperatureField
solver: !ablate::finiteElement::IncompressibleFlowSolver
  id: theFlowField
  options: {}
  parameters:
    strouhal: 1.0
    reynolds: 1.0
    peclet: 1.0
    mu: 1.0
    k: 1.0
    cp: 1.0
  boundaryConditions:
    - !ablate::finiteElement::boundaryConditions::Essential
      boundaryName: "wall velocity"
      labelIds: [3, 1, 2, 4]
      boundaryValue: *velocityField
    - !ablate::finiteElement::boundaryConditions::Essential
      boundaryName: "wall temp"
      labelIds: [3, 1, 2, 4]
      boundaryValue: *temperatureField
  monitors:
    - !ablate::monitors::FieldErrorMonitor
    - !ablate::monitors::Probes
      probes:
        - name: incompressibleFlowRestartProbe
          location: [ .25, .25 ]
      bufferSize: 10
      variables: [ temperature ]