Boundary layer

Menu: Mesh->Boundary layer

A boundary layer mesh is one mesh attached to the boundary, and which has a certain distribution of nodes separated from the boundray following a certain stretching function. The streching function and the grow factor of the boundary layer meshes of a model can be set in Preferences->Meshing .

User can define two main properties to the boundary layer meshes of each geometrical entity: First layer height and Number of layers. When selecting the entities which will have boundary layer mesh a window shows a schematic picture, where user can see the distribution of heights of each layer, and the total height of the boundary layer mesh when the assigned properties are set.

Only tetrahedra or triangle elements are generated in the boundary layer mesh, and there is no transition elements for conecting tetras to other kind of elements in the 'isotropic' mesh, so the mesh of the volume or surface which has a boundary layer mesh must be of tetrahedra or triangle.

Boundary layer mesh can only be generated with linear elements (not quadratic ones).

Boundary layer mesh window