flow123d_version: 3.1.0
problem: !Coupling_Sequential
  description: Operation with unknown region set .side at address /problem/solute_equation/output_stream/observe_points/0
  mesh:
    mesh_file: ../00_mesh/prism_11el.msh
    regions:
      
      # region 'empty_region_label' will be created with no elements
      - !From_Label
        name: empty_region_label
        # region not defined in the mesh
        mesh_label: missing_region
        allow_empty: true
        
      # region '.up' will be renamed to '.top'
      - !From_Label
        name: .top
        # region defined in the mesh
        mesh_label: .up
        #allow_empty: true
      
      # region '.down' will be renamed to '.bottom',
      # allowing no elements (however this region is not empty)
      - !From_Label
        name: .bottom
        # region defined in the mesh
        mesh_label: .down
        allow_empty: true
        
  flow_equation: !Flow_Darcy_MH
    nonlinear_solver:
      linear_solver: !Petsc
        r_tol: 1.0e-10
        a_tol: 1.0e-10
    n_schurs: 2
    input_fields:
      - region: ALL
        conductivity: 1e-6
        
      # region not defined in the mesh
      - region: empty_region_label
        conductivity: 1e-3
      
      # renamed region
      - region: [.top]
        bc_type: dirichlet
        bc_pressure: !FieldFormula
          value: z
      
      # renamed region
      - region: [.bottom]
        bc_type: dirichlet
        bc_pressure: !FieldFormula
          value: z
          
      - region: [.back, .front]
        bc_type: dirichlet
        bc_pressure: !FieldFormula
          value: x
    balance: {}
    output:
      fields:
        - velocity_p0
    output_stream:
      format: !gmsh
