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In the two-dimensional case, it corresponds to (according to the MODULEF approach):
- generating meshes from point, line, contour, course mesh, etc., data, using the appropriate
algorithms;
- modifying existing meshes and combining them to form the final mesh, step by step, to which a
D.S. of type NOPO is associated. This D.S. is then stored in a sequential access file.
In order to achieve the above steps, we need to:
- locate all the primal sub-sets in the domain by eliminating all sub-sets which can be derived by
symmetry, translation, etc., or more generally, by geometric transformation;
- record, furthermore, the primal sub-sets linked to physical type constraints;
- search for the module which is the most suitable for each of these sub-sets;
- determine the nature of the data which each of these modules use;
- construct the data from the points and lines present;
- activate the desired mesh generator(s);
- perform the symmetries, translations, rotations, etc., of the primal sub-sets;
- "glue" these meshes together, two by two;
- repeat the two previous steps until the entire domain is covered;
- perform some local or global transformations (refinement, regularization, etc.);
- define the non-vertex nodes, if necessary, and remove the vertices from the nodal list;
- renumber, if necessary, the elements and/or nodes;
- store the result on file (and plot it to verify and ensure the quality of the mesh).
For each primal sub-set, we select the module which is most suitable:
- for a deformed quadrilateral or triangle, modules TRICOO and QUACOO
(algebraic methods ) generates quadrangles, which can be split into triangles,
and triangles;
- for an arbitrary domain, modules TRIFRO and TRIHER (advancing-front method
and Voronoi's method ) generates triangles;
- similarly, COLIB2 (multi-block method ), in the 2D version,
produces the same result from a partitioning of a course mesh of the domain.
- when the elements to be created are few or identical, module CONOPO
(manual method ) could be used;
- CONOPO is suitable to mesh lines into segments;
- MAOBJE is used to treat catalogued objects.






![[BIG]](../icons/zoom18.gif)
![[Normal]](../icons/zoom14.gif)
![[small]](../icons/zoom10.gif)
Next: 1.3 Main ideas
Up: 1 Two-dimensional mesh generation
Prev: 1.1 Introduction
Index
Contents