Unstructured mesh generation

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Meshing

Introduction

Mesh classification

Structured mesh generation

Algebraic grid generation Elliptic grid generation

Unstructured mesh generation

Special topics

Mesh adaptation First cell height calculation

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It is difficult make general statements about unstructured mesh generation algorithms because the most prominent methods are very different in nature. The most popular family of algorithms are those based upon Delaunay triangulation, but other methods, such as quadtree/octree approaches are also used.

Delaunay Methods

Many of the commonly used unstructured mesh generation techniques are based upon the properties of the Delaunay triangulation and its dual, the Voronoi diagram. Given a set of points in a plane, a Delaunay triangulation of these points is the set of triangles such that no point is inside the circumcircle of a triangle. The triangulation is unique if no three points are on the same line and no four points are on the same circle. A similar definition holds for higher dimensions, with tetrahedra replacing triangles in 3D.

Quadtree/Octree Methods

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