atmBoundaryLayerInletK

Description

The atmBoundaryLayerInletK is a boundary condition that provides boundary condition for the turbulent kinetic energy (i.e. k) for homogeneous, two-dimensional, dry-air, equilibrium and neutral atmospheric boundary layer modelling.

The ground-normal k profile expression:

$$k = \frac{(u^*)^2}{\sqrt{C_\mu}} \sqrt{C_1 \ln \left( \frac{z - d + z_0}{z_0} \right) + C_2}$$

where:

Property	Description
$k$	Ground-normal turbulent kinetic energy profile [m^2/s^3]
$u^*$	Friction velocity [m/s]
$C_\mu$	Empirical model constant [-]
$C_1$	Curve-fitting coefficient for YGCJ profiles [-]
$C_2$	Curve-fitting coefficient for YGCJ profiles [-]

Usage

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

Boundary file

<patchName>
{
    type            patch;
    ...
}

Field file

<patchName>
{
    // Mandatory entries
    type            atmBoundaryLayerInletK;

    // Inherited entries
    ...
    flowDir         (1 0 0);    // not used
    zDir            (0 0 1);    // not used
}

where:

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

The inherited entries are elaborated in:

• atmBoundaryLayer.H
• inletOutletFvPatchField.H

Further information

Tutorial:

• turbineSiting

Source code:

• atmBoundaryLayerInletK

API:

• Foam::atmBoundaryLayerInletKFvPatchScalarField

History: Introduced in version v1806