Directories’ structure

The following directories tree is a representation of a file arrangement for setting up an OpenFoam® case:

.
├── 0.orig                          →  Initial value settings
│   ├── k                                   →  Turbulent kinetic energy
│   ├── nut                                 →  Turbutent kinematic viscosity
│   ├── omega                               →  Specific rate of turbulent dissipation
│   ├── p                                   →  Pressure
│   └── U                                   →  Velocity
├── Allclean
├── Allrun
├── constant                        →  Initial value settings
│   ├── transportProperties                 →  Fluid properties
│   └── turbulenceProperties                →  Turbulence model selection
└── system                          →  Settings
    ├── blockMeshDict                       → Dictionary for cartesian mesh generation
    ├── controlDict                         → Running time and I/O control
    ├── decomposeParDict                    → Dictionary to control the parallelization scheme
    ├── fvSchemes                           → Terms, scheme, numerical settings
    ├── fvSolution                          → Tolerance, algorithm and solver settings
    ├── snappyHexMeshDict                   → Dictionary for mesh generation (with snappyHexMesh)
    └── surfaceFeatureExtractDict           → Dictionary de facto needed for mesh generation (with snappyHexMesh)

You can change the problem settings on-the-fly during the calculation, on the dictionaries:

- controlDict
- fvSchemes
- fvSolution

As long as in system/controlDict the option is set as:

runTimeModifiable     yes

before the calculation is instanciated.