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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 3.2 Final//FR"><!-- Converted with LaTeX2HTML 95.1 (Fri Jan 20 1995) --><!-- by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds --><!-- Modified Simulog 03/97 --><HTML><HEAD><TITLE>2.2 Methodology</TITLE><LINK REL=STYLESHEET TYPE="text/css" HREF="./Modulef.css" TITLE="Modulef CSS"><meta name="description" value="2.2 Methodology"><meta name="keywords" value="Guide3"><meta name="resource-type" value="document"><meta name="distribution" value="global"></HEAD><BODY BGCOLOR="#FFFFFF"><P> <IMG SRC="../icons/smallmod.gif" WIDTH=211 HEIGHT=50 ALIGN=BOTTOM ALT="Modulef"><A NAME=tex2html1230 HREF="node30.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif" ALT="previous"></A><A NAME=tex2html1236 HREF="node29.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif" ALT="up"></A><A NAME=tex2html1238 HREF="node32.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif" ALT="next"></A><A NAME=tex2html1240 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif" ALT="contents"></A><A NAME=tex2html1241 HREF="node28.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/index_motif.gif" ALT="index"></A><A HREF="../Guide3-18/node31.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM ALT="[BIG]"></A><A HREF="../Guide3-14/node31.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM ALT="[Normal]"></A><A HREF="../Guide3-10/node31.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html1239 HREF="node32.html">2.3 Main ideas</A><B>Up: </B> <A NAME=tex2html1237 HREF="node29.html">2 Three-dimensional mesh generation (1)</A><B> Prev: </B> <A NAME=tex2html1231 HREF="node30.html">2.1 Introduction</A><B><A HREF="node28.html" >Index</A></B><B><A HREF="node2.html" >Contents</A></B><HR SIZE=3 WIDTH="75%"><H1><A NAME=SECTION00520000000000000000>2.2 Methodology</A></H1><P><P><P>For the <b> three-dimensional</b> case, it corresponds to:<P><UL><LI> generating meshes from point, two-dimensional meshes, coarse meshes, etc., data, using the appropriate algorithms;<LI> modifying existing meshes and combining them to form the final mesh, step by step, to which a D.S. of type <b> NOPO</b> is associated. This D.S. is then stored in a sequential access file.</UL><P>In order to perform the above steps, we need to:<P><UL><LI> locate all the <i> primal</i> sub-sets in the domain by eliminating all sub-sets which can be derived by symmetry, translation, etc., or more generally, by geometric transformation;<LI> locate the domains which can be derived from a two-dimensional mesh of one of its sections; <LI> record, furthermore, the primal subsets linked to physical type constraints;<LI> search for the module which is the most suitable for each of these sub-sets;<LI> determine the nature of the data which each of these modules use;<LI> construct the data from the points, ..., present; <LI> activate the desired mesh generator(s);<LI> perform the symmetries, translations, rotations, etc., of the primal sub-sets;<LI> "glue" these meshes together, two by two;<LI> repeat the two previous steps until the entire domain is covered; <LI> split the elements into tetrahedra or into sub-elements of thesame type, if desired;<LI> define the non-vertex nodes, if necessary, and remove the vertices from the nodal list;<LI> renumber, if necessary, the elements and/or nodes;<LI> store the result on file (and plot it to verify and ensure the quality of the mesh).</UL><P>For each primal sub-set, we select the module which is most suitable:<P><UL><LI> for a topologically hexahedral domain, we use, excluding <b> APNOP3</b>, module <b> GEL3D1</b> (see chapter <A HREF="node43.html#chap3">3</A>); <LI> For a topologically cylindrical domain, we use module <b> MA2D3D</b> (see chapter <A HREF="node43.html#chap3">3</A>, orkeyword <b> MA23</b> of <b> APNOP3</b>);<LI> for an arbitrary domain, module <b> COLIB2</b> (multi-block method), or the correspondingprocessor <b> COLIXX</b>, is used excluding <b> APNOP3</b> (see chapter <A HREF="node43.html#chap3">3</A>);<LI> when the elements to be created are few or identical, module <b> CONOPO</b>(manual method) could be used;<LI> module <b> MAOBJE</b> is used to treat catalogued objects;<LI> for all cases where the mesh is created not using <b> APNOP3</b>, if the mesh must be usedfor fine manipulations, <b> SDREST</b> is used to introduce this mesh into memory and manipulate itvia the different possibilities presented by <b> APNOP3</b>.</UL><P><P><P><HR SIZE=3 WIDTH="75%"><IMG SRC="../icons/smallmod.gif" WIDTH=211 HEIGHT=50 ALIGN=BOTTOM ALT="Modulef"><A NAME=tex2html1230 HREF="node30.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif" ALT="previous"></A><A NAME=tex2html1236 HREF="node29.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif" ALT="up"></A><A NAME=tex2html1238 HREF="node32.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif" ALT="next"></A><A NAME=tex2html1240 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif" ALT="contents"></A><A NAME=tex2html1241 HREF="node28.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/index_motif.gif" ALT="index"></A><A HREF="../Guide3-18/node31.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM ALT="[BIG]"></A><A HREF="../Guide3-14/node31.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM ALT="[Normal]"></A><A HREF="../Guide3-10/node31.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html1239 HREF="node32.html">2.3 Main ideas</A><B>Up: </B> <A NAME=tex2html1237 HREF="node29.html">2 Three-dimensional mesh generation (1)</A><B> Prev: </B> <A NAME=tex2html1231 HREF="node30.html">2.1 Introduction</A><B><A HREF="node28.html" >Index</A></B><B><A HREF="node2.html" >Contents</A></B><BR> <HR><P><ADDRESS></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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