**Additional Hypotheses** can be applied as a supplement to the main hypotheses, introducing additional concepts to mesh creation.
-An **Additional Hypothesis** can be defined in the same way as any main hypothesis in :ref:`create_mesh_anchor` or :ref:`constructing_submeshes_page` dialog.
+An **Additional Hypothesis** can be defined in the same way as any main hypothesis in :ref:`Create Mesh <create_mesh_anchor>` or :ref:`Create Sub-Mesh <constructing_submeshes_page>` dialog.
The following additional hypothesis are available:
* :ref:`propagation_anchor` and :ref:`propagofdistribution_anchor` hypotheses are useful for creation of quadrangle and hexahedral meshes.
-* :ref:`viscous_layers_anchor` and :ref:`viscous_layers_anchor` hypotheses allow creation of layers of highly stretched elements near mesh boundary, which is beneficial for high quality viscous computations.
+* :ref:`Viscous Layers <viscous_layers_anchor>` and :ref:`Viscous Layers 2D <viscous_layers_anchor>` hypotheses allow creation of layers of highly stretched elements near mesh boundary, which is beneficial for high quality viscous computations.
* :ref:`quadratic_mesh_anchor` hypothesis allows generation of second order meshes.
-* :ref:`quadrangle_preference_anchor` enables generation of quadrangles.
+* :ref:`quadrangle_preference_anchor` hypothesis enables generation of quadrangles.
meshing parameters.
This hypothesis can be taken into account by
-:ref:`a1d_algos_anchor` and
-:ref:`a1d_algos_anchor` "Composite Side Discretization" algorithms.
+:ref:`Wire Discretization <a1d_algos_anchor>` and
+:ref:`Composite Side Discretization <a1d_algos_anchor>` algorithms.
-**See Also** a sample TUI Script of a :ref:`tui_propagation` operation
+**See Also** a sample TUI Script of a :ref:`Propagation hypothesis <tui_propagation>` operation
.. _propagofdistribution_anchor:
has been locally defined on the opposite edge.
This hypothesis can be taken into account by
-:ref:`a1d_algos_anchor` "Wire Discretization" and
-:ref:`a1d_algos_anchor` "Composite Side Discretization" algorithms.
+:ref:`Wire Discretization <a1d_algos_anchor>` and
+:ref:`Composite Side Discretization <a1d_algos_anchor>` algorithms.
-**See Also** a sample TUI Script of a :ref:`tui_propagation` operation
+**See Also** a sample TUI Script of a :ref:`Propagation hypothesis <tui_propagation>` operation
.. _viscous_layers_anchor:
* **Number of layers** - defines the number of element layers.
* **Stretch factor** - defines the growth factor of element height from the mesh boundary inwards.
* **Extrusion method** (available in 3D only) - defines how positions of nodes are found during prism construction and how the creation of distorted and intersecting prisms is prevented.
-* **Surface offset + smooth** method extrudes nodes along the normal to the underlying geometrical surface. Smoothing of the internal surface of element layers is possible to avoid creation of invalid prisms.
-* **Face offset** method extrudes nodes along the average normal of surrounding mesh faces to the intersection with a neighbor mesh face translated along its own normal by the thickness of layers. The thickness of layers can be limited to avoid creation of invalid prisms.
-* **Node offset** method extrudes nodes along the average normal of surrounding mesh faces by the thickness of layers. The thickness of layers can be limited to avoid creation of invalid prisms.
+
+ * **Surface offset + smooth** method extrudes nodes along the normal to the underlying geometrical surface. Smoothing of the internal surface of element layers is possible to avoid creation of invalid prisms.
+ * **Face offset** method extrudes nodes along the average normal of surrounding mesh faces to the intersection with a neighbor mesh face translated along its own normal by the thickness of layers. The thickness of layers can be limited to avoid creation of invalid prisms.
+ * **Node offset** method extrudes nodes along the average normal of surrounding mesh faces by the thickness of layers. The thickness of layers can be limited to avoid creation of invalid prisms.
.. image:: ../images/viscous_layers_extrusion_method.png
:align: center
.. centered::
- "Prisms created by the tree extrusion methods at the same other parameters"
+ Prisms created by the tree extrusion methods at the same other parameters
* **Specified Faces/Edges are** - defines how the shapes specified by the next parameter are used.
* **Faces/Edges with/without layers** - defines geometrical faces or edges on which element layers either should be or should not be constructed, depending on the value of the previous parameter (**Specified Faces/Edges are**). Faces (or edges) can be selected either in the Object Browser or in the VTK Viewer. **Add** button becomes active as soon as a suitable sub-shape is selected.
-.. note::
- A mesh shown in the 3D Viewer can prevent selection of faces and edges, just hide the mesh to avoid this. If a face, which should be selected, is hidden by other faces, consider creating a group of faces to be selected in the Geometry module. To avoid a long wait when a geometry with many faces (or edges) is displayed, the number of faces (edges) shown at a time is limited by the value of "Sub-shapes preview chunk size" preference (in Preferences/Mesh/General tab).
+ .. note::
+ A mesh shown in the 3D Viewer can prevent selection of faces and edges, just hide the mesh to avoid this. If a face, which should be selected, is hidden by other faces, consider creating a group of faces to be selected in the Geometry module. To avoid a long wait when a geometry with many faces (or edges) is displayed, the number of faces (edges) shown at a time is limited by the value of :ref:`Sub-shapes preview chunk size <chunk_size_pref>` preference (in Preferences/Mesh/General tab).
-If faces/edges without layers are specified, the element layers are
+ If faces/edges without layers are specified, the element layers are
not constructed on geometrical faces shared by several solids in 3D
case and edges shared by several faces in 2D case. In other words,
in this mode the element layers can be constructed on boundary faces
boundary faces/edges of the shape of this sub-mesh, at same time
possibly being internal faces/edges within the whole model.
-.. image:: ../images/viscous_layers_on_submesh.png
- :align: center
+ .. image:: ../images/viscous_layers_on_submesh.png
+ :align: center
-.. centered::
+ .. centered::
2D viscous layers constructed on boundary edges of a sub-mesh on a disk face.
-If you use **several** hypotheses to define viscous layers on faces of
+ If you use **several** hypotheses to define viscous layers on faces of
one solid, keep in mind the following. Each hypothesis defines a set
of faces with viscous layers (even if you specify faces without
layers). The sets of faces with viscous layers defined by several
presence of an additional mid-side node).
This 1D hypothesis can be taken into account by
-:ref:`a1d_algos_anchor` "Wire Discretization" and
-:ref:`a1d_algos_anchor` "Composite Side Discretization" algorithms. To create a quadratic mes assign this hypothesis at
-:ref:`constructing_meshes_page`.
+:ref:`Wire Discretization <a1d_algos_anchor>` and
+:ref:`Composite Side Discretization <a1d_algos_anchor>` algorithms. To create a quadratic mes assign this hypothesis at
+:ref:`mesh construction <constructing_meshes_page>`.
See :ref:`adding_quadratic_elements_page` for more information about quadratic meshes.
This additional hypothesis can be used together with 2D triangulation algorithms.
It allows 2D triangulation algorithms to build quadrangular meshes.
-Usage of this hypothesis with "Quadrangle: Mapping" meshing algorithm is obsolete since introducing :ref:`hypo_quad_params_anchor` "Quadrangle parameters" hypothesis.
-Usage of this hypothesis with "Quadrangle: Mapping" meshing algorithm corresponds to specifying "Quadrangle Preference" transition type of :ref:`hypo_quad_params_anchor` "Quadrangle parameters" hypothesis.
+Usage of this hypothesis with :ref:`Quadrangle: Mapping <quad_ijk_algo_page>` meshing algorithm is obsolete since introducing :ref:`Quadrangle parameters <hypo_quad_params_anchor>` hypothesis.
+Usage of this hypothesis with :ref:`Quadrangle: Mapping <quad_ijk_algo_page>` meshing algorithm corresponds to specifying *Quadrangle Preference* transition type of :ref:`Quadrangle parameters <hypo_quad_params_anchor>` hypothesis.
.. note::
- "Quadrangle Preference" transition type can be used only if the total quantity of segments on all sides of the face is even (divisible by 2), else "Standard" transition type is used.
+ *Quadrangle Preference* transition type can be used only if the total quantity of segments on all sides of the face is even (divisible by 2), else *Standard* transition type is used.
