Description🔗
The nutURoughWallFunction
is boundary condition that provides
a wall function on the turbulent viscosity (i.e. nut
) based on velocity
(i.e. U
) for low- and high-Reynolds number applications for rough walls.
Usage🔗
The condition requires entries in both the boundary and field files.
Boundary file🔗
<patchName>
{
type wall;
...
}
Field file🔗
<patchName>
{
// Mandatory entries
type nutURoughWallFunction;
roughnessHeight <scalar>;
roughnessConstant <scalar>;
roughnessFactor <scalar>;
// Optional entries
maxIter <label>;
tolerance <scalar>;
// Inherited entries
...
}
where:
Property | Description | Type | Required | Default |
---|---|---|---|---|
type |
Type name: nutURoughWallFunction
|
word | yes | - |
roughnessHeight |
Roughness height | scalar | yes | - |
roughnessConstant |
Roughness constant | scalar | yes | - |
roughnessFactor |
Scaling factor | scalar | yes | - |
maxIter |
Number of Newton-Raphson iterations | label | no | 10 |
tolerance |
Convergence tolerance | scalar | no | 0.0001 |
The inherited entries are elaborated in:
-
nutWallFunctionFvPatchScalarField.H
-
Suffers from non-exact restart since
correctNut()
(called throughturbulence->validate
) returns a slightly different value every time it is called. SeenutUSpaldingWallFunctionFvPatchScalarField.C
.
Further information🔗
Tutorial:
- N/A
Source code:
API:
History:
- Introduced in version 2.4.0