An unstructured grid is a tessellation of a part of the Euclidean plane or Euclidean space by simple shapes, such as triangles or tetrahedra, in an irregular pattern. Grids of this type may be used in finite element analysis when the input to be analyzed has an irregular shape. Visualization of how a car deforms in an asymmetrical crash using finite element analysis. ... A tessellated plane seen in street pavement. ... In mathematics and astronomy, Euclidean space is a generalization of the 2- and 3-dimensional spaces studied by Euclid. ... Around 300 BC, the Greek mathematician Euclid laid down the rules of what has now come to be called Euclidean geometry, which is the study of the relationships between angles and distances in space. ... A triangle is one of the basic shapes of geometry: a polygon with three vertices and three sides which are straight line segments. ... A tetrahedron (plural: tetrahedra) is a polyhedron composed of four triangular faces, three of which meet at each vertex. ... Visualization of how a car deforms in an asymmetrical crash using finite element analysis. ...
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