Description🔗

The freestreamVelocity is a generic boundary condition that provides a free-stream condition for velocity. It is an inlet-outlet condition that uses the velocity orientation to continuously blend between fixed value for normal inlet and zero gradient for normal outlet flow.

Usage🔗

The condition requires entries in both the boundary and field files.

Boundary file🔗

<patchName>
{
    type            patch;
    ...
}

Field file🔗

<patchName>
{
    // Mandatory entries
    type            freestreamVelocity;
    freestreamValue <vectorField>;

    // Inherited entries;
    ...
}

where:

The inherited entries are elaborated in:

• Foam::fvPatchField
• Foam::mixedFvPatchField

Further information🔗

Tutorial:

• $FOAM_TUTORIALS/compressible/rhoPimpleFoam/RAS/aerofoilNACA0012
• $FOAM_TUTORIALS/incompressible/simpleFoam/airFoil2D

Source code:

• $FOAM_SRC/finiteVolume/fields/fvPatchFields/derived/freestreamVelocity

API:

• Foam::freestreamVelocityFvPatchVectorField

History:

• Introduced in version v1806