Directional mesh-wave wall distance


directionalMeshWave is a variant of meshWave distance-to-patch calculation method, with which the distance component in a specified direction can be ignored, e.g. the distance-to-patch can be computed in the wall-normal direction only.

For a given point within a given mesh, the existing meshWave method gives the orthogonal distance to a specified patch. In meshes with very steep terrain (e.g. a hill of 90 [deg]), this might be problematic for the fields that require the distance to the patch associated with the terrain surface.

An example of directionalMeshWave output in terms of the wall distance can be seen as follows:

Wall distance field by directionalMeshWave


Example specification of directionalMeshWave method in system/fvSchemes.wallDist:

    // Mandatory entries (unmodifiable)
    method      directionalMeshWave;
    normal      (0 0 1);

    // Optional (inherited) entries (unmodifiable)
Property Description Type Required Default
method Method name: directionalMeshWave word yes -
normal The direction component to ignore vector yes -

The inherited entries are elaborated in:

Further information


Source code


  • Introduced in version v2006