The splitting direction is defined by the orientation of the
underlying geometrical edge.
-<b>Reverse Edges</b> list box allows specifying the edges, for which the splitting should be made in the
-direction opposite to their orientation. This list box is filled after a geometry object is selected for meshing. In this case it is possible to select edges to be reversed either directly picking them in
-the 3D viewer or by selecting the edges or groups of edges in the
-Object Browser.
+<b>Reverse Edges</b> list box allows specifying the edges, for which
+the splitting should be made in the direction opposite to their
+orientation. This list box is usable only if a geometry object is
+selected for meshing. In this case it is possible to select edges to
+be reversed either directly picking them in the 3D viewer or by
+selecting the edges or groups of edges in the Object Browser.
\image html a-geometric1d.png
</li>
</ol>
To apply this algorithm when you define your mesh, select <b>Body
- Fitting</b> in the list of 3D algorithms and add <b>Body Fitting Parameters</b> hypothesis. The following dialog will appear:
+ Fitting</b> in the list of 3D algorithms and add <b>Body Fitting
+ Parameters</b> hypothesis. The following dialog will appear:
<br>
\anchor cartesian_hyp_anchor
\image html cartesian_implement_edge.png "Implement Edges switched off to the left and on to the right"
- <li> <b>Definition mode</b> allows choosing how Cartesian structured grid is defined. Location of nodes along each grid axis is defined individually:
+ <li> <b>Definition mode</b> allows choosing how Cartesian structured
+ grid is defined. Location of nodes along each grid axis is defined
+ individually:
<ul>
<li> You can specify the \b Coordinates of grid nodes. \b Insert button
- inserts a node at \b Step distance(negative or positive) from the
+ inserts a node at \b Step distance (negative or positive) from the
selected node. \b Delete button removes the selected node. Double
click on a coordinate in the list enables its edition.
\b Note that node coordinates are measured along directions of
<em>f(t)</em> where \a t is a position along a grid axis
normalized at [0.0,1.0]. The whole range of geometry can be
divided into sub-ranges with their own spacing formulas to apply;
- \a t varies between 0.0 and 1.0 within each sub-range. \b Insert button
+ \a t varies between 0.0 and 1.0 within each sub-range. \b Insert button
divides a selected range into two. \b Delete button adds the
selected sub-range to the previous one. Double click on a range in
the list enables edition of its right boundary. Double click on a
</li> </ul>
</li>
- <li> <b> Fixed Point</b> group allows defining an exact location of a grid node in the direction defined by spacing. The following cases are possible:
-<ul>
-<li>If all three directions are defined by spacing, there will be a mesh node at the <b> Fixed Point</b>. </li>
-<li>If two directions are defined by spacing, there will be at least a link between mesh nodes passing through the <b> Fixed Point</b>.</li>
-<li> If only one direction is defined by spacing, there will be at least an element facet passing through the <b> Fixed Point</b>.</li>
-<li>If no directions are defined by spacing, <b> Fixed Point</b> is disabled.</li>
-</ul>
-</li>
+ <li> <b> Fixed Point</b> group allows defining an exact location of
+ a grid node in the direction defined by spacing. The following cases
+ are possible:
+ <ul>
+ <li>If all three directions are defined by spacing, there will
+ be a mesh node at the <b> Fixed Point</b>. </li>
+ <li>If two directions are defined by spacing, there will be at
+ least a link between mesh nodes passing through the <b> Fixed
+ Point</b>.</li>
+ <li> If only one direction is defined by spacing, there will be
+ at least an element facet passing through the <b> Fixed
+ Point</b>.</li>
+ <li>If no directions are defined by spacing, <b> Fixed Point</b>
+ is disabled.</li>
+ </ul>
+ </li>
<li> <b> Directions of Axes</b> group allows setting the directions of grid axes.
<ul>
Parameters to be defined in this mode:
<ul>
-<li><b>Group of elements to duplicate</b> (<em>mandatory</em>): these
- elements will be duplicated.</li>
-<li><b>Construct group with newly created elements</b> option
- (<em>checked by default</em>): if checked - the group of newly created
- elements will be built. The name of the created group starts from
- "DoubleElements".</li>
+ <li><b>Group of elements to duplicate</b> (<em>mandatory</em>): these
+ elements will be duplicated.</li>
+ <li><b>Construct group with newly created elements</b> option
+ (<em>checked by default</em>): if checked - the group of newly created
+ elements will be built. The name of the created group starts from
+ "DoubleElements".</li>
</ul>
<br>
\anchor mode_group_boundary_anchor
<h2>Duplicate nodes on group boundaries</h2>
-This mode duplicates nodes located on boundaries between given groups of volumes.
+This mode duplicates nodes located on boundaries between given groups of volumes.
<br>
Parameters to be defined in this mode:
<ul>
-<li><b>Groups of volumes</b> (<em>mandatory</em>): list of volume
- groups. These groups should be disjoint, i.e. should not have shared volumes.</li>
-<li> If <b>Create joint elements</b> option is activated, flat elements are created on the duplicated
-nodes: a triangular facet shared by two volumes of two groups generates
-a flat prism, a quadrangular facet generates a flat hexahedron.</li>
-<li> If <b>On all boundaries</b> : option is activated, the volumes, which are not
- included into <b>Groups of volumes</b>, are considered as another group and thus the nodes on the boundary between <b>Groups of volumes</b> and the remaining mesh are also duplicated.</li>
+ <li><b>Groups of volumes</b> (<em>mandatory</em>): list of volume
+ groups. These groups should be disjoint, i.e. should not have shared
+ volumes.</li>
+ <li> If <b>Create joint elements</b> option is activated, flat
+ elements are created on the duplicated nodes: a triangular facet
+ shared by two volumes of two groups generates a flat prism, a
+ quadrangular facet generates a flat hexahedron.
+ <br>
+ The created flat volumes are stored in groups. These groups are named
+ according to the position of the group in the list of groups: group
+ "j_n_p" is a group of flat elements that are built between the group \#n
+ and the group \#p in the group list. All the flat elements are gathered
+ into the group named "joints3D". The flat element of the multiple
+ junctions between the simple junction are stored in a group named
+ "jointsMultiples".</li>
+ <li> If <b>On all boundaries</b> option is activated, the volumes,
+ which are not included into <b>Groups of volumes</b>, are considered
+ as another group and thus the nodes on the boundary
+ between <b>Groups of volumes</b> and the remaining mesh are also
+ duplicated.</li>
</ul>
<br><b>See Also</b> a sample TUI Script of a
\image html image74.gif
<center><em>"Edit Group" button</em></center>
-The following dialog box will appear:
+The following dialog box will appear (if the selected group
+is <em>standalone</em>, else this dialog looks different):
\image html editgroup.png
In this dialog box you can modify the name and the color of your group
-despite of its type. You can add or remove the elements forming a
+despite of its type. You can add or remove the elements composing a
<em>standalone group</em>. You can change criteria of the filter of
-the <em>group on filter</em>. For more information see
+a <em>group on filter</em>. For more information see
\ref creating_groups_page "Creating Groups" page.
<li>Click the \b Apply or <b>Apply and Close</b> button to confirm
<em>To convert an existing group on geometry or a group on filer into
a standalone group of elements and modify:</em>
<ol>
-<li>Select your group on geometry (or your group on filter) in the
+<li>Select your group on geometry (or on filter) in the
Object Browser and in the \b Mesh menu click the <b>Edit Group as
-Standalone</b> item.</li>
+Standalone</b> item.</li>
\image html image74.gif
<center><em>"Edit Group as Standalone" button</em></center>
-The selected group will be converted into a standalone group and
+The selected group will be converted into a standalone group and
its contents can be modified.
<li>Click the \b Apply or <b>Apply and Close</b> button to confirm modification of the
\page grouping_elements_page Grouping elements
In Mesh module it is possible to create groups of mesh elements:
-nodes, edges, faces or volumes. One group contains elements of only
-one type. The following ways of creation are possible:
+nodes, edges, faces, volumes, 0D elements or balls. One group contains
+elements of only one type. The following ways of creation are
+possible:
- by selecting the elements using filters and/or directly on the
presentation in the VTK viewer, and/or by using elements of other
- \subpage using_operations_on_groups_page "Subjected to Boolean operations"
- \subpage deleting_groups_page "Deleted"
-If sub-meshes or groups container item has more than one child sub-object, it is possible to sort the children in ascending order. For this, select the parent object in the Object Browser and choose <b>Sort children</b> context menu item.
+In the Object Browser, if groups or sub-meshes container item has more
+than one child sub-object, it is possible to sort the children in
+ascending order. For this, select the parent object in the Object
+Browser and choose <b>Sort children</b> context menu item.
\image html smesh_sort.png "Sorting of sub-objects"
An important tool, providing filters for creation of \b Standalone
-groups is \ref selection_filter_library_page.
+groups and groups <b>On Filter</b> is \ref selection_filter_library_page.
*/
\image html meshtopass2.png "Automatic node selection"
</li>
-<li>Specify the way of node selection: manually (the first radio button) or automatically (the second radio button).</li>
-
-<li>If the manual method is selected, select the necessary node (X, Y, Z fields show the original coordinates of the node to move) or set the node ID.</li>
+<li>Specify the way of node selection: manually (the first radio
+ button) or automatically (the second radio button).</li>
+<li>If the manual method is selected, select the necessary node (X, Y,
+ Z fields show the original coordinates of the node to move) or type
+ the node ID.</li>
<li>Enter the coordinates of the destination point.</li>
-<li>Click <b>Update Destination</b> button to update the coordinates of the destination point.</li>
-<li>Activate \b Preview check-box to show the result of move in the viewer</li>
-<li>Click the \b Apply or <b>Apply and Close</b> button to confirm the operation.</li>
+<li>Click <b>Update Destination</b> button to set the coordinates
+ of the destination point equal to the coordinates of the node to
+ move.</li>
+<li>Activate \b Preview check-box to show the result of move in the
+ viewer.</li>
+<li>Click the \b Apply or <b>Apply and Close</b> button to confirm the
+ operation.</li>
</ol>
\image html moving_nodes1.png "The initial mesh"
<li>If \b Tetrahedron element type is selected, <b> Split hexahedron </b> group allows specifying the number of tetrahedra a hexahedron will be split into. If the chosen method does not allow to get a conform mesh, a generic solution is applied: an additional node is created at the gravity center of a hexahedron, serving an apex of tetrahedra, all quadrangle sides of the hexahedron are split into two triangles each serving a base of a new tetrahedron.</li>
-<li>If \Prism element type is selected, the <b>Split hexahedron</b> group looks as follows:
+<li>If \b Prism element type is selected, the <b>Split hexahedron</b> group looks as follows:
\image html split_into_prisms.png
