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Description

The atmBoundaryLayerInletOmega is a boundary condition that provides boundary condition for the specific dissipation rate (i.e. omega) for homogeneous, two-dimensional, dry-air, equilibrium and neutral atmospheric boundary layer modelling.

The ground-normal omega profile expression:

\[\omega = \frac{u^*}{\kappa \sqrt{C_\mu}} \frac{1}{z - d + z_0}\]

where:

Property Description
\(\omega\) Ground-normal specific dissipation rate profile [m^2/s^3]
\(u^*\) Friction velocity [m/s]
\(\kappa\) von Karman constant [-]
\(C_\mu\) Empirical model constant [-]
\(z\) Ground-normal coordinate component [m]
\(d\) Ground-normal displacement height [m]
\(z_0\) Aerodynamic roughness length [m]

Usage

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

Boundary file 

<patchName>
{
    type            patch;
    ...
}

Field file 

<patchName>
{
    // Mandatory entries
    type            atmBoundaryLayerInletOmega;

    // Inherited entries
    ...
}

where:

Property Description Type Required Default
type Type name: atmBoundaryLayerInletOmega word yes -

The inherited entries are elaborated in:

  • atmBoundaryLayer.H
  • inletOutletFvPatchField.H

Further information

Tutorial:

Source code:

API:

History:

  • Introduced in version v2006