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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:

Source code:

API:

History:

  • Introduced in version v1806