Triangular Surface Meshing

Surfaces can be triangulated in ADINA using either an advancing front or a Delaunay surface mesher.

Advancing Front

  • A standard 2D advancing front algorithm is applied in parameter space.
  • Actual distances are obtained from the surface first fundamental form.
  • Sizes are controlled by a quadtree built in parameter space.
  • Elements are created considering a minimum quality threshold, which can be repeatedly relaxed if the algorithm does not converge.
  • There is no optimization or smoothing applied to the obtained mesh.


  • A standard 2D Delaunay insertion algorithm is applied in parameter space.
  • Sizes are controlled using interpolation on the current mesh.
  • Resulting mesh is optimized and smoothed.


  • The advancing front surface mesher is fast, robust (in its ability to generate a mesh for a given surface), and it creates high quality meshes.
  • The Delaunay mesher is probably more robust (in the rare cases the advancing front mesher fails to produce a mesh) but is, at the time being, slower (see timings below). This is not of high concern since the time required to mesh surfaces still represents a small percentage of the total time to mesh a body.
  • The Delaunay methodology is employed mostly for special purposes like quadrilateral meshing, anisotropic meshing, curvature-based refinement, and mesh adaptation.

Please click on thumbnails for larger image.

Mechanical part (advancing front).
Mechanical part (Delaunay).

This is a model with mostly primitive surfaces.

Turbine impeller (advancing front).
Turbine impeller (Delaunay).

This is a model with lofted surfaces.

Other ADINA Mesh Generation Features:

Mapped Meshing          Tetrahedral Meshing          Mesh Adaptation-Repair

Anisotropic Meshing        Automatic Grading        Curvature-based Meshing

Triangular Surface Meshing              Quadrilateral Surface Meshing