fixedMeanOutletInlet

Description

The fixedMeanOutletInlet is a general boundary condition that extrapolates field to the patch using the near-cell values and adjusts the distribution to match the specified, optionally time-varying, mean value. This extrapolated field is applied as a fixedValue for outflow faces but zeroGradient is applied to inflow faces.

This boundary condition can be applied to pressure when inletOutlet is applied to the velocity so that a zeroGradient condition is applied to the pressure at inflow faces where the velocity is specified to avoid an unphysical over-specification of the set of boundary conditions.

Usage

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

Boundary file

<patchName>
{
    type            patch;
    ...
}

Field file

<patchName>
{
    // Mandatory entries
    type            fixedMeanOutletInlet;
    meanValue       <Function1<Type>>;

    // Optional entries
    phi             <word>;

    // Inherited entries;
    ...
}

where:

Property	Description	Type	Required	Default
type	Type name: fixedMeanOutletInlet	word	yes	-
meanValue	Mean value that the field is adjusted to maintain	Function1<Type>	yes	-
phi	Name of flux field	word	no	phi

The inherited entries are elaborated in:

• Foam::outletInletFvPatchField
• Foam::Function1

Further information

Tutorial:

• N/A

Source code:

• fixedMeanOutletInlet

API:

• Foam::fixedMeanOutletInletFvPatchField

History: Introduced in version v1806