The left half of the figure shows a triangular-shaped surface containing a structured mesh. The right half of the figure shows the same surface after converting to a triangular unstructured mesh. All the quadrilateral cells in the original structured mesh have been replaced by two triangular cells by adding a diagonal. The triangular cells in the original structured mesh, where grid lines come together at one of the vertices of the triangular-shaped surface, are unchanged.
Last updated 19 July 2007