Description🔗

The interfaceCompression is a generic boundary condition that applies interface-compression to the phase-fraction distribution at the patch by setting the phase-fraction to 0 if it is below 0.5, otherwise to 1.

This approach is useful to avoid unphysical “bleed” of the lighter phase along the surface in regions of high shear adjacent to the surface which is at a shallow angle to the interface.

Usage🔗

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

Boundary file🔗

<patchName>
{
    type            patch;
    ...
}

Field file🔗

<patchName>
{
    // Mandatory entries
    type            interfaceCompression;

    // Inherited entries
    ...
}

where:

The inherited entries are elaborated in:

• Foam::fixedValueFvPatchField

Further information🔗

Tutorial:

• N/A

Source code:

• $FOAM_SRC/finiteVolume/fields/fvPatchFields/derived/interfaceCompression

API:

• Foam::interfaceCompressionFvPatchScalarField

History:

• Introduced in version v1706