Numerical Models

Numerical Models#

Setting up a numerical model implemented in commercial or non-commercial codes may cause a lot of headache. This page features some basic principles to avoid problems with numerical models.

Mesh generation and quality#

The hints for meshing are extracted from Olsen (1999) and Olsen (2012).


  • Mesh transition: Cells should not be smaller or larger than 50% or 200%, respectively of the size of neighboring cells.

  • Prefer triangular meshes over rectangular meshes (computational efficiency).

Triangular meshes:

  • Avoid wide or acute triangles (optimum: equilateral triangles). No internal angle should be less than 22°.

Rectangular meshes:

  • All internal angle should be close to 90°.