flow123d_version: 4.0.0a01
problem: !Coupling_Sequential
  description: "[u'test18:', u'diffusion', u'through', u'fractures']"
  mesh:
    mesh_file: ../00_mesh/triangle_1x1x1_frac.msh
    regions:
      - !From_Elements
        name: center
        id: 30
        element_list:
          - 45
  flow_equation: !Flow_Darcy_LMH
    nonlinear_solver:
      linear_solver: !Petsc
        a_tol: 1.0e-12
        r_tol: 1.0e-12
    input_fields:
      - region: .BOUNDARY
        bc_type: dirichlet
        bc_pressure: 0
      - rid: 20
        cross_section: 0.01
      - rid: 24
        cross_section: 1
    output:
      fields:
        - pressure_p0
        - velocity_p0
    output_stream:
      file: ./test18.pvd
      format: !vtk
        variant: ascii
  solute_equation: !Coupling_OperatorSplitting
    transport: !Solute_AdvectionDiffusion_DG
      input_fields:
        - region: .BOUNDARY
          bc_conc: 0
        - rid: 20
          init_conc: 0
          diff_m: 0.1
        - rid: 24
          init_conc: 0
          diff_m: 0.1
          dg_penalty: 100
        - rid: 30
          init_conc: 1
      solver: !Petsc
        a_tol: 1.0e-12
        r_tol: 1.0e-12
    output_stream:
      file: ./transport-implicit.pvd
      format: !vtk
        variant: ascii
      times:
        - step: 0.001
      precision: 15
    substances:
      - A
    time:
      end_time: 0.01
      max_dt: 0.001
    balance:
      cumulative: true
