freestreamPressure

Description

The freestreamPressure is a generic boundary condition that provides a free-stream condition for pressure. It is an outlet-inlet condition that uses the velocity orientation to continuously blend between zero gradient for normal inlet and fixed value 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            freestreamPressure;
    freestreamValue <scalarField>;

    // Optional entries
    U               <word>;

    // Inherited entries;
    ...
}

where:

Property	Description	Type	Required	Default
type	Type name: freestreamPressure	word	yes	-
freestreamValue	Patch value	scalarField	yes	-
U	Name of velocity field	word	no	U

The inherited entries are elaborated in:

• Foam::fvPatchField
• Foam::mixedFvPatchField

Further information

Tutorial:

• aerofoilNACA0012
• airFoil2D

Source code:

• freestreamPressure

API:

• Foam::freestreamPressureFvPatchScalarField

History: Introduced in version 1.5