Computational Grids
Complex Geometries and Fields
CAD Creation - Parametric Design
 

Boundary Layer Mesh (y+) Regeneration

Boundary Layer Mesh (y+) Regeneration automatically adjusts the thickness of the first layer of the boundary layer mesh according to solution data calculated using an initial mesh so that a near constant y+ value is achieved at all surface nodes. The new y+ value can be higher or lower than the existing y+ values. Certain solvers and certain turbulence models require y+ values within certain ranges. If the original mesh deviates too far from these desired ranges, Boundary Layer Mesh Regeneration can be used to adjust the thickness of the first layer elements so that the y+ values meet the required criteria.

Aircraft Boundary Layer Mesh - y+ Regeneration

These pictures show the boundary layer mesh for an aircraft before and after y+ regeneration. The initial mesh produced a solution with a wide range of y+ values. After regenerating the mesh, the new solution has near constant y+ values.


Supersonic Duct - y+ Regeneration

These pictures show the boundary layer mesh for a supersonic duct before and after y+ regeneration. The initial mesh produced y+ values around 100,000 which is much higher than the desired y+ value of 1000. After regenerating the mesh, the final y+ values are constant and much lower than in the original mesh.