atmOmegaWallFunction

Description

The atmOmegaWallFunction is a boundary condition that provides a wall constraint on the specific dissipation rate (i.e. omega) and the turbulent kinetic energy production contribution (i.e. G) for atmospheric boundary layer modelling.

References

• Theoretical expressions (tags:PGVB, B):

Parente, A., Gorlé, C., Van Beeck, J., & Benocci, C. (2011).
Improved k–ε model and wall function formulation
for the RANS simulation of ABL flows.
J. of wind engineering and industrial aerodynamics, 99(4), 267-278.
DOI:10.1016/j.jweia.2010.12.017

Bredberg, J. (2000).
On the wall boundary condition for turbulence models.
Chalmers University of Technology, Depart. of Thermo and Fluid Dyn.
Internal Report 00/4. Sweden: Göteborg.

Usage

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

Boundary file

<patchName>
{
    type            patch;
    ...
}

Field file

<patchName>
{
    // Mandatory entries
    type            atmOmegaWallFunction;
    z0              <PatchFunction1<scalar>>;

    // Inherited entries
    ...
}

where:

Property	Description	Type	Required	Default
type	Type name: atmOmegaWallFunction	word	yes	-
z0	Surface roughness length [m]	PatchFunction1<scalar>	yes	-

The inherited entries are elaborated in:

• omegaWallFunctionFvPatchScalarField.H
• PatchFunction1.H

Further information

Tutorial:

• atmFlatTerrain

Source code:

• atmOmegaWallFunction

API:

• Foam::atmOmegaWallFunctionFvPatchScalarField

History: Introduced in version v2006