geom/doc/salome/gui/GEOM/whgdata/whlstg0.htm
2004-12-17 11:18:33 +00:00

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<title>Glossary words list</title>
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<p class="glsbody" style="margin-bottom:1pt;"><a name="bm_C"></a><nobr><b>Cell</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">Element of a mesh. Cells are determined by their connectivity. They can have 0,1,2 or 3 dimension.<p>
<p class="glsbody" style="margin-bottom:1pt;"><nobr><b>Component</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">One integer or real value can correspond to each component of a field and to each entity of a mesh<p>
<p class="glsbody" style="margin-bottom:1pt;"><a name="bm_D"></a><nobr><b>Descendant connectivity</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">It is a description of the entities of the mesh with dimension N. This description is made by an ordered list of geometrical entities (nodes, edges, or faces) with dimension N-1.<p>
<p class="glsbody" style="margin-bottom:1pt;"><a name="bm_E"></a><nobr><b>Edge</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">An edge of a volumetric or surface mesh. It is composed of 2 or 3 nodes (2 vertex nodes and optionally one middle node).<p>
<p class="glsbody" style="margin-bottom:1pt;"><nobr><b>Entity of a mesh</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">Geometrical component of the mesh: node, cell, face and edge. Faces and edges are only intermediate entities allowing to define the cells in descendant connectivity.<p>
<p class="glsbody" style="margin-bottom:1pt;"><nobr><b>Equivalence</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">Equivalence represents a list of correspondance 2 by 2 of the entities of the same dimension.<p>
<p class="glsbody" style="margin-bottom:1pt;"><a name="bm_F"></a><nobr><b>Face</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">Face of a volumetrical cell (triangle, quadrangle).<p>
<p class="glsbody" style="margin-bottom:1pt;"><nobr><b>Family</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">Entities of a mesh are described by a certain number&nbsp; of characteristics (boundary conditions, groups membership). Families represent classes equivalent to these characteristics (two entities of a mesh can belong to the same family if they have the same characteristics). Every family is determined by a set of attributes and a list of groups membership.<p>
<p class="glsbody" style="margin-bottom:1pt;"><nobr><b>Field</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">Field consists of one or several scalar components. One definite type is associated to the given field and the values corresponding to different components are all of the same type.<p>
<p class="glsbody" style="margin-bottom:1pt;"><nobr><b>Field profile</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">Fields can be defined only on one part of the mesh. Profile&nbsp; of the field or profile of the component of a field indicates which entities of the mesh contain values.<p>
<p class="glsbody" style="margin-bottom:1pt;"><a name="bm_G"></a><nobr><b>Group</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">Unordered set of entities of a mesh. One entity can belong to&nbsp; several groups.<p>
<p class="glsbody" style="margin-bottom:1pt;"><a name="bm_M"></a><nobr><b>Mesh</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">Mesh is described by its geometry: list of nodes and list of cells which constitute this mesh. Supplementary information is added with the help of families (initial, boundary conditions).<p>
<p class="glsbody" style="margin-bottom:1pt;"><a name="bm_N"></a><nobr><b>Nodal connectivity</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">It is a description of an entity of the mesh by an ordered list of nodes constituting this entity.<p>
<p class="glsbody" style="margin-bottom:1pt;"><nobr><b>Node</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">Node can be an isolated node of a mesh, a vertex or middle node of an edge. A node is associated to a point.<p>
<p class="glsbody" style="margin-bottom:1pt;"><a name="bm_P"></a><nobr><b>Point</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">Geometrical entity determined by its coordinates in the space.<p>
<p class="glsbody" style="margin-bottom:1pt;"><a name="bm_R"></a><nobr><b>Reference connectivity</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">For each type of entity of a mesh, reference connectivity define the topology of an entity.<p>
<p class="glsbody" style="margin-bottom:1pt;"><nobr><b>Result</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">List of fields referring to one mesh.<p>
<p class="glsbody" style="margin-bottom:1pt;"><a name="bm_S"></a><nobr><b>Study</b></nobr></p>
<p class="glsbody" style="margin-top:1pt;">Study represents a chain of sequences of calculations.<p>
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