∇

Description

The outletInlet is a generic mixed boundary condition that sets the patch value to a user-specified fixedValue for reverse flows, and treats inflow using a zeroGradient condition.

Usage

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

Boundary file 

<patchName>
{
    type            patch;
    ...
}

Field file 

<patchName>
{
    // Mandatory entries
    type            outletInlet;
    outletValue     <Field>;

    // Optional entries
    phi             phi;

    // Inherited entries
}

where:

Property Description Type Required Default
type Type name: outletInlet word yes -
outletValue Outlet field for reverse flow Field yes -
phi Name of the local mass flux word no phi

The inherited entries are elaborated in:

  • Foam::mixedFvPatchField

  • The mode of operation is determined by the sign of the flux across the patch faces.
  • Sign conventions:
    • Positive flux (out of domain): apply the “outletValue” fixed-value
    • Negative flux (into domain): apply zero-gradient condition

Further information

Tutorial:

Source code:

API:

History:

  • Introduced in version 1.5