Boundary Conditions¶

Defines field boundary conditions for OpenFOAM simulation domains using the changeDictionaryDict approach.

Type: BC.BoundaryCondition

Parameters¶

Parameter	Type	Description
`fields`	object	Per-field boundary condition definitions

Each field contains patch definitions with:

Property	Type	Description
`type`	string	Boundary condition type
`value`	varies	Boundary value

Common Boundary Condition Types¶

Type	Description	Value
`fixedValue`	Fixed value at boundary	`uniform (Ux Uy Uz)` or `uniform value`
`zeroGradient`	Zero normal gradient	—
`noSlip`	No-slip wall condition	—
`inletOutlet`	Switches between fixed value and zero gradient	`inletValue`, `value`
`symmetryPlane`	Symmetry condition	—
`empty`	2D simulation empty direction	—
`fixedFluxPressure`	Fixed flux pressure	`value uniform 0`
`kqRWallFunction`	Turbulent kinetic energy wall function	`value uniform value`
`epsilonWallFunction`	Epsilon wall function	`value uniform value`
`nutkWallFunction`	Turbulent viscosity wall function	`value uniform 0`

Output¶

Field	Description
`Result`	The rendered boundary condition dictionary content

Example¶

{
    "BoundaryConditions": {
        "Execution": {
            "input_parameters": {
                "fields": {
                    "U": {
                        "inlet": {
                            "type": "fixedValue",
                            "value": "uniform (10 0 0)"
                        },
                        "outlet": {
                            "type": "zeroGradient"
                        },
                        "walls": {
                            "type": "noSlip"
                        }
                    },
                    "p": {
                        "inlet": {
                            "type": "zeroGradient"
                        },
                        "outlet": {
                            "type": "fixedValue",
                            "value": "uniform 0"
                        },
                        "walls": {
                            "type": "zeroGradient"
                        }
                    },
                    "k": {
                        "inlet": {
                            "type": "fixedValue",
                            "value": "uniform 0.1"
                        },
                        "outlet": {
                            "type": "zeroGradient"
                        },
                        "walls": {
                            "type": "kqRWallFunction",
                            "value": "uniform 0.1"
                        }
                    }
                }
            }
        },
        "type": "BC.BoundaryCondition"
    }
}