<!doctype HTML public "-//W3C//DTD HTML 4.0 Frameset//EN"> <html> <head> <title>About hypotheses</title> <meta http-equiv="content-type" content="text/html; charset=windows-1252"> <meta name="generator" content="RoboHelp by eHelp Corporation www.ehelp.com"> <link rel="stylesheet" href="../default_ns.css"><script type="text/javascript" language="JavaScript" title="WebHelpSplitCss"> <!-- if (navigator.appName !="Netscape") { document.write("<link rel='stylesheet' href='../default.css'>");} //--> </script> <style type="text/css"> <!-- img_whs1 { border:none; width:30px; height:30px; float:none; border-style:none; } ul.whs2 { list-style:disc; } p.whs3 { background-color:Transparent; color:#000000; } ol.whs4 { list-style:disc; } --> </style><script type="text/javascript" language="JavaScript"> <!-- if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) == 4)) { var strNSS = "<style type='text/css'>"; strNSS += "p.whs3 {background-color:white; }"; strNSS +="</style>"; document.write(strNSS); } //--> </script> <script type="text/javascript" language="JavaScript" title="WebHelpInlineScript"> <!-- function reDo() { if (innerWidth != origWidth || innerHeight != origHeight) location.reload(); } if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == "Netscape")) { origWidth = innerWidth; origHeight = innerHeight; onresize = reDo; } onerror = null; //--> </script> <style type="text/css"> <!-- div.WebHelpPopupMenu { position:absolute; left:0px; top:0px; z-index:4; visibility:hidden; } p.WebHelpNavBar { text-align:right; } --> </style><script type="text/javascript" language="javascript1.2" src="../whmsg.js"></script> <script type="text/javascript" language="javascript" src="../whver.js"></script> <script type="text/javascript" language="javascript1.2" src="../whproxy.js"></script> <script type="text/javascript" language="javascript1.2" src="../whutils.js"></script> <script type="text/javascript" language="javascript1.2" src="../whtopic.js"></script> <script type="text/javascript" language="javascript1.2"> <!-- if (window.gbWhTopic) { if (window.setRelStartPage) { addTocInfo("MESH module\nCreating meshes\nDefining hypotheses\nAbout Hypotheses"); addButton("show",BTN_IMG,"Show","","","","",0,0,"../whd_show0.gif","../whd_show2.gif","../whd_show1.gif"); addButton("hide",BTN_IMG,"Hide","","","","",0,0,"../whd_hide0.gif","../whd_hide2.gif","../whd_hide1.gif"); } if (window.setRelStartPage) { setRelStartPage("../index.htm"); autoSync(1); sendSyncInfo(); sendAveInfoOut(); } } else if (window.gbIE4) document.location.reload(); //--> </script> </head> <body page-style="x-size: Letter;"><script type="text/javascript" language="javascript1.2"> <!-- if (window.writeIntopicBar) writeIntopicBar(4); //--> </script> <h1>About hypotheses</h1> <p><img src="../i_blue.jpg" x-maintain-ratio="TRUE" width="30px" height="30px" border="0" class="img_whs1"> <span style="font-weight: bold;"><B>Hypotheses</B></span> represent boundary conditions which will be taken into account at calculations of meshes or submeshes basing on geometrical objects. These hypotheses allow you to manage the level of detail of the resulting meshes or submeshes: when applying different hypotheses with different parameters you can preset the quantity of meshing elements which will compose your mesh. So, it will be possible to generate a rough or a more refined mesh or submesh. </p> <p> </p> <p>In <span style="font-weight: bold;"><B>MESH </B></span>there are the following Basic Hypotheses (to introduce them, you operate numerical values):</p> <ul type="disc" class="whs2"> <li style="list-style: circle; /*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ " type=circle class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm">1D Hypotheses</a> (for meshing of <span style="font-weight: bold;"><B>edges)</B></span>:</p></li> <ul type="disc" class="whs2"> <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ " class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#arithmetic_1D">Arithmetic 1D</a></p></li> <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ " class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#Average_length">Average Length</a></p></li> <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ " class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#deflection_1D">Deflection 1D </a></p></li> <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ " class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#Number_of_elements">Number of segments</a></p></li> <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ " class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#start_and_end_length">Start and end length</a></p></li> <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ " class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#automatic_length">Automatic Length</a></p></li> </ul> <li style="list-style: circle; /*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ " type=circle class=kadov-p><p class="whs3"><a href="max._element_area_hypothesis.htm">2D Hypotheses</a> (for meshing of <span style="font-weight: bold;"><B>faces)</B></span>: </p></li> </ul> <ol type="disc" class="whs4"> <ul type="disc" class="whs2"> <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ " class=kadov-p><p class="whs3"><a href="max._element_area_hypothesis.htm#max_element_area">Max Element Area</a></p></li> <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ " class=kadov-p><p class="whs3"><a href="max._element_area_hypothesis.htm#length_from_edges">Length from Edges</a></p></li> <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ " class=kadov-p><p class="whs3"><a href="max._element_area_hypothesis.htm#quadrangle preference">Quadrangle Preference</a></p></li> </ul> </ol> <ul type="disc" class="whs2"> <li style="list-style: circle; /*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ " type=circle class=kadov-p><p class="whs3">3D Hypothesis (for meshing of <span style="font-weight: bold;"><B>volumes)</B></span>: </p></li> <ul type="disc" class="whs2"> <li class=kadov-p><p><a href="max._element_volume_hypothsis.htm">Max Element Volume</a></p></li> </ul> </ul> <p> </p> <p>There also exist some <a href="non_conform_mesh_allowed_hypothesis.htm">Additional Hypotheses</a></p> <ul type="disc" class="whs2"> <ul type="disc" class="whs2"> <li class=kadov-p><p>Propagation of 1D Hypothesis on opposite edges</p></li> <li class=kadov-p><p>Non conform mesh allowed</p></li> <li class=kadov-p><p>Quadratic mesh</p></li> </ul> </ul> <p> </p> <p>The choice of a hypothesis depends on:</p> <ul type="disc" class="whs2"> <li class=kadov-p><p>the geometrical object (shape) which will be meshed</p></li> <li class=kadov-p><p>the algorithm, which will be selected for meshing of this geometrical object (shape)</p></li> </ul> <p> </p> <p> </p> <script type="text/javascript" language="javascript1.2"> <!-- if (window.writeIntopicBar) writeIntopicBar(0); //--> </script> </body> </html>