Description🔗
The alphatFilmWallFunction
is boundary condition that provides
a turbulent thermal diffusivity condition
when using wall functions, for use with surface film models. This
condition varies from the standard wall function by taking into account any
mass released from the film model.
Usage🔗
The condition requires entries in both the boundary and field files.
Boundary file🔗
<patchName>
{
type patch;
...
}
Field file🔗
<patchName>
{
// Mandatory entries
type alphatFilmWallFunction;
// Optional entries
filmRegion <word>;
B <scalar>;
yPlusCrit <scalar>;
Cmu <scalar>;
kappa <scalar>;
Prt <scalar>;
// Inherited entries
...
}
where:
Property | Description | Type | Required | Default |
---|---|---|---|---|
type |
Type name: alphatFilmWallFunction
|
word | yes | - |
B |
B coefficient | scalar | no | 5.5 |
yPlusCrit |
y+ value for laminar -> turbulent transition | scalar | no | 11.05 |
Cmu |
Empirical model coefficient | scalar | no | 0.09 |
kappa |
von Karman constant | scalar | no | 0.41 |
Prt |
Turbulent Prandtl number | scalar | no | 0.85 |
The inherited entries are elaborated in:
- fixedValueFvPatchField.H
Further information🔗
Tutorial:
Source code:
API:
History:
- Introduced in version 2.0.0