∇

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:

Further information

Tutorial:

Source code:

API:

History:

  • Introduced in version 1.5