Description🔗

The kLowReWallFunction is boundary condition that provides a wall function for the turbulent kinetic energy (i.e. k) for low- and high-Reynolds number simulations.

Viscous and inertial sublayer predictions for \c k are blended in a stepwise manner:

\[k = k_{log} \qquad if \quad y^+ > y^+_{intersection}\] \[k = k_{vis} \qquad if \quad y^+ <= y^+_{intersection}\]

where:

Usage🔗

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

Boundary file🔗

<patchName>
{
    type            wall;
    ...
}

Field file🔗

<patchName>
{
    // Mandatory entries
    type            kLowReWallFunction;

    // Optional entries
    Ceps2           <scalar>;
    Ck              <scalar>;
    Bk              <scalar>;
    C               <scalar>;

    // Inherited entries
    ...
}

where:

The inherited entries are elaborated in:

• wallFunctionCoefficients.H
• fixedValueFvPatchField.H

Further information🔗

Tutorial:

• N/A

Source code:

• $FOAM_SRC/TurbulenceModels/turbulenceModels/derivedFvPatchFields/wallFunctions/kqRWallFunctions/kLowReWallFunction

API:

• Foam::kLowReWallFunctionFvPatchScalarField

History:

• Introduced in version 2.4.0