Description๐
The atmBoundaryLayerInletVelocity
is a boundary condition that provides
a log-law type ground-normal inlet boundary condition for the streamwise
component of wind velocity (i.e. u
) for homogeneous, two-dimensional,
dry-air, equilibrium and neutral atmospheric boundary layer modelling.
The ground-normal streamwise flow speed profile expression:
\[u = \frac{u^*}{\kappa} \ln \left( \frac{z - d + z_0}{z_0} \right)\] \[v = w = 0\]where:
Property | Description |
---|---|
\(u\) | Ground-normal streamwise flow speed profile [m/s] |
\(v\) | Spanwise flow speed [m/s] |
\(w\) | Ground-normal flow speed [m/s] |
\(u^*\) | Friction velocity [m/s] |
\(\kappa\) | von Kรกrmรกn constant [-] |
\(z\) | Ground-normal coordinate component [m] |
\(d\) | Ground-normal displacement height [m] |
\(z_0\) | Aerodynamic roughness length [m] |
Usage๐
The condition requires entries in both the boundary and field files.
Boundary file๐
<patchName>
{
type patch;
...
}
Field file๐
<patchName>
{
// Mandatory entries
type atmBoundaryLayerInletVelocity;
// Inherited entries
...
}
where:
Property | Description | Type | Required | Default |
---|---|---|---|---|
type |
Type name: atmBoundaryLayerInletVelocity
|
word | yes | - |
The inherited entries are elaborated in:
- atmBoundaryLayer.H
- inletOutletFvPatchField.H
Further information๐
Tutorial:
Source code:
API:
History:
- Introduced in version v1806