freestreamVelocity

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:

Property	Description	Type	Required	Default
type	Type name: freestreamVelocity	word	yes	-
freestreamValue	Patch value	vectorField	yes	-

The inherited entries are elaborated in:

• Foam::fvPatchField
• Foam::mixedFvPatchField

Further information

Tutorial:

• aerofoilNACA0012
• airFoil2D

Source code:

• freestreamVelocity

API:

• Foam::freestreamVelocityFvPatchVectorField

History: Introduced in version v1806