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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., Gorlรฉ, C., Van Beeck, J., & Benocci, C. (2011). Improved kโ€“ฮต 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: Gรถteborg.

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:

Source code:

API:

History:

  • Introduced in version v2006