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2D Meshing Hypotheses



Max Element Area

Max Element Area hypothesis is applied for meshing of 2D faces composing your geometrical object. Definition of this hypothesis consists of setting the maximum area of meshing elements (depending on the chosen meshing algorithm it can be triangles or quadrangles), which will compose the mesh of these 2D faces.

a-maxelarea.png


max_el_area.png
In this example, Max. element area is very small compared to the 1D hypothesis

See Also a sample TUI Script of a Maximum Element Area hypothesis operation.


Length from Edges

Length from edges hypothesis builds 2D mesh segments having a length calculated as an average edge length for a given wire.

See Also a sample TUI Script of a Length from Edges hypothesis operation.


Quadrangle parameters

hypo_quad_params_dialog.png
Quadrangle parameters creation/edition dialog

Quadrangle parameters is a hypothesis for Quadrangle (Mapping).

Base vertex parameter allows using Quadrangle (Mapping) algorithm for meshing of triangular faces. In this case it is necessary to select the vertex, which will be used as the fourth edge (degenerated).

hypo_quad_params_1.png
A face built from 3 edges
hypo_quad_params_res.png
The resulting mesh

This parameter can be also used to mesh a segment of a circular face. Please, consider that there is a limitation on the selection of the vertex for the faces built with the angle > 180 degrees (see the picture).

hypo_quad_params_2.png
3/4 of a circular face

In this case, selection of a wrong vertex for the Base vertex parameter will generate a wrong mesh. The picture below shows the good (left) and the bad (right) results of meshing.

hypo_quad_params_res_2.png
The resulting meshes

Type parameter is used on faces with a different number of segments on opposite sides to define the algorithm of transition between them. The following types are available:

  • Standard is the default case, when both triangles and quadrangles are possible in the transition area along the finer meshed sides.
  • Triangle preference forces building only triangles in the transition area along the finer meshed sides. This type corresponds to Triangle Preference additional hypothesis, which is obsolete now.
  • Quadrangle preference forces building only quadrangles in the transition area along the finer meshed sides. This hypothesis has a restriction: the total quantity of segments on all four sides of the face must be even (divisible by 2). This type corresponds to Quadrangle Preference additional hypothesis, which is obsolete now.
  • Quadrangle preference (reversed) works in the same way and with the same restriction as Quadrangle preference, but the transition area is located along the coarser meshed sides.
  • Reduced type forces building only quadrangles and the transition between the sides is made gradually, layer by layer. This type has a limitation on the number of segments: one pair of opposite sides must have the same number of segments, the other pair must have an even difference between the numbers of segments on the sides.

See Also a sample TUI Script of a Quadrangle Parameters hypothesis.


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