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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>5.2.1 Top-down analysis</TITLE><LINK REL=STYLESHEET TYPE="text/css" HREF="./Modulef.css" TITLE="Modulef CSS"><meta name="description" value="5.2.1 Top-down analysis"><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=tex2html1727 HREF="node70.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif" ALT="previous"></A><A NAME=tex2html1733 HREF="node70.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif" ALT="up"></A><A NAME=tex2html1735 HREF="node72.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif" ALT="next"></A><A NAME=tex2html1737 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif" ALT="contents"></A><A NAME=tex2html1738 HREF="node28.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/index_motif.gif" ALT="index"></A><A HREF="../Guide3-18/node71.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM ALT="[BIG]"></A><A HREF="../Guide3-14/node71.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM ALT="[Normal]"></A><A HREF="../Guide3-10/node71.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html1736 HREF="node72.html">5.2.2 Bottom-up construction</A><B>Up: </B> <A NAME=tex2html1734 HREF="node70.html">5.2 A two-dimensional example</A><B> Prev: </B> <A NAME=tex2html1728 HREF="node70.html">5.2 A two-dimensional example</A><B><A HREF="node28.html" >Index</A></B><B><A HREF="node2.html" >Contents</A></B><HR SIZE=3 WIDTH="75%"><H2><A NAME=SECTION00821000000000000000>5.2.1 Top-down analysis</A></H2><P><P><A NAME=6062> </A><IMG BORDER=0 ALIGN=BOTTOM ALT="" SRC="img200.gif"><BR><STRONG>Figure 5.1:</STRONG> <i> The domain under consideration</i><A NAME=figfour1> </A><BR><P><P>The domain of interest is shown in figure <A HREF="node71.html#figfour1">5.1</A>. The analysis of the geometry and the presence ofseveral materials leads us to define four principal parts:<P><DL COMPACT><DT>i<DD> the <b> shield</b> (part 4.4 of the figure): its quadrilateral form urges us to use the<b> QUACOO</b> mesh generator, i.e. the algebraic method producing elements of a quadrilateral nature constructedfrom the input data consisting of the contour of the part considered;the data consists of the 4 sides (from a topological point of view);<DT>ii<DD> the <b> air zone</b> (part 4.3 of the figure): it corresponds to the quadrilateral pierced bya square; this implies that the boundary of this part has 2 components; consequently, we will use the<b> TRIHER</b> mesh generator, i.e. the Voronoi method producing triangular elements constructed fromthe input data consisting of the contour of this part; the data consists of the union of the constituent lines;<DT>iii<DD> the <b> semiconductor</b> (part 4.2 of the figure): due to its shape, we use, again, mesh generator <b> TRIHER</b> (Voronoi method) which requires the contour of this part as input data (i.e the union of the constituent lines);<DT>iv<DD> the <b> half-cooling circuit</b> (part 4.1 of the figure): due to its shape, we will again usemesh generator <b> TRIHER</b>.<P> </DL><P>The <b> "gluing together"</b> of the meshes of 4.1 and 4.2 (module <b> RECOLC</b>) will result in the mesh of thecorresponding half-square. By <b> symmetry</b> (module <BR>[4] <b> MODNOP</b>), we will obtain the mesh of the symmetric part of the half-square; by <b> "gluing"</b> it to the preceding mesh (module <b> RECOLC</b>), the complete mesh of the cooling circuit and its conductor will be constructed.<P>It remains to "glue" (module <b> RECOLC</b>) this mesh to that of the air zone and then "glue" thisresult to the mesh of the shield; finally, the end-result will be stored on file (module <b> SAUVER</b>).<P><P><P>The set of modules necessary is therefore the following:<UL><LI> to create the meshes: <b> QUACOO</b> and <b> TRIHER</b>;<LI> to transform the meshes: <b> MODNOP</b> and <b> RECOLC</b>;<LI> to save the result on file: <b> SAUVER</b>.</UL><P><P><P>In terms of keywords of <b> APNOPO</b>, we have:<UL><LI> to create the meshes: <b> QUAC</b> and <b> TRIH</b>;<LI> to transform the meshes: <b> SYMD</b> and <b> RECO</b>;<LI> to save the result on file: <b> SAUV</b>.</UL><P><P><P>In terms of data, we have successively:<P><UL><LI> to create the meshes:<P><UL><LI> calling <b> QUACOO</b>, keyword <b> QUAC</b>, requires the data of a discretization of the<b> contour</b> of the part under consideration. This contour must include 4 sides, amongst them, 2 sides opposite each other must be described by the same number of sub-segments. An arbitrary side is formed by one or several characteristic lines. The latter are defined by their 2 end-points and some parameters describing the manner in which they will be discretized.<LI> calling <b> TRIHER</b>, keyword <b> TRIH</b>, similarly requires the data of a discretization of the <b> contour</b> of the part under consideration.A contour consists of several characteristic lines described as above. In the event that the contour consistsof 2 parts, we input first the external part (in an <i> anti-clockwise</i> direction) followed by theinternal part (in the <i> reverse</i> direction).</UL><P><LI> to transform meshes:<UL><LI> calling <b> MODNOP</b>, keyword <b> SYMD</b>, requires the input of the <i> equation of the line</i> of symmetry.<LI> calling <b> RECOLC</b>, keyword <b> RECO</b>, requires the data of parameter <IMG BORDER=0 ALIGN=BOTTOM ALT="" SRC="img199.gif">, the precision threshold for the identification of the "gluing" zones.</UL><P><LI> to save the result on file:<UL><LI> calling <b> SAUVER</b>, keyword <b> SAUV</b>, requires the definition of the <i> level</i> of the mesh whichwe want to save on file.</UL></UL><P>In terms of keywords of <b> APNOPO</b> we therefore need, in addition:<UL><LI> for the creation of the contours: the definition of the lines via <b> LIGN</b>; <UL><LI> if a line is defined via a curve whose equation is known, it is described using keyword<b> COUR</b></UL><LI> for the creation of the lines: the definition of the points via <b> POIN</b>;</UL><HR SIZE=3 WIDTH="75%"><IMG SRC="../icons/smallmod.gif" WIDTH=211 HEIGHT=50 ALIGN=BOTTOM ALT="Modulef"><A NAME=tex2html1727 HREF="node70.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif" ALT="previous"></A><A NAME=tex2html1733 HREF="node70.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif" ALT="up"></A><A NAME=tex2html1735 HREF="node72.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif" ALT="next"></A><A NAME=tex2html1737 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif" ALT="contents"></A><A NAME=tex2html1738 HREF="node28.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/index_motif.gif" ALT="index"></A><A HREF="../Guide3-18/node71.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM ALT="[BIG]"></A><A HREF="../Guide3-14/node71.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM ALT="[Normal]"></A><A HREF="../Guide3-10/node71.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html1736 HREF="node72.html">5.2.2 Bottom-up construction</A><B>Up: </B> <A NAME=tex2html1734 HREF="node70.html">5.2 A two-dimensional example</A><B> Prev: </B> <A NAME=tex2html1728 HREF="node70.html">5.2 A two-dimensional example</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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