atmBoundaryLayerInletOmega

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:

• atmDownstreamDevelopment

Source code:

• atmBoundaryLayerInletOmega

API:

• Foam::atmBoundaryLayerInletOmegaFvPatchScalarField

History: Introduced in version v2006