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<title>About hypotheses</title>
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2005-11-28 14:57:47 +05:00
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<h1>About hypotheses</h1>
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<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
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boundary conditions which will be taken into account at calculations of
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meshes or submeshes basing on geometrical objects. These hypotheses allow
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you to manage the level of detail of the resulting meshes or submeshes:
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when applying different hypotheses with different parameters you can preset
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the quantity of meshing elements which will compose your mesh. So, it
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will be possible to generate a rough or a more refined mesh or submesh.
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</p>
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<p> </p>
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<p>In <span style="font-weight: bold;"><B>MESH </B></span>there are the following
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Basic Hypotheses (to introduce them, you operate numerical values):</p>
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<ul type="disc" class="whs2">
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<li style="list-style: circle; /*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
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type=circle
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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>
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<ul type="disc" class="whs2">
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<li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
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class=kadov-p><p class="whs3">Arithmetic
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1D</p></li>
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<li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
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class=kadov-p><p class="whs3">Average
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Length</p></li>
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<li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
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class=kadov-p><p class="whs3">Deflection
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1D </p></li>
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<li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
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class=kadov-p><p class="whs3">Number
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of segments</p></li>
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<li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
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class=kadov-p><p class="whs3">Start
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and end length</p></li>
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</ul>
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<li style="list-style: circle; /*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
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type=circle
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class=kadov-p><p class="whs3">2D
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Hypothesis (for meshing of <span style="font-weight: bold;"><B>faces)</B></span>:
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</p></li>
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</ul>
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<ul type="disc" class="whs2">
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<ul type="disc" class="whs2">
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<li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
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class=kadov-p><p class="whs3"><a href="max._element_area_hypothesis.htm">Max Element Area</a></p></li>
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</ul>
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</ul>
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<ul type="disc" class="whs2">
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<li style="list-style: circle; /*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
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type=circle
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class=kadov-p><p class="whs3">3D
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Hypothesis (for meshing of <span style="font-weight: bold;"><B>volumes)</B></span>:
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</p></li>
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<ul type="disc" class="whs2">
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<li class=kadov-p><p><a href="max._element_volume_hypothsis.htm">Max
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Element Volume</a></p></li>
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</ul>
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</ul>
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<p> </p>
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<p>There also exist some <a href="non_conform_mesh_allowed_hypothesis.htm">Additional
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Hypotheses</a></p>
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<ol type="disc" class="whs4">
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<ul type="disc" class="whs2">
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<li class=kadov-p><p>Propagation of 1D Hypothesis on opposite edges</p></li>
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<li class=kadov-p><p>Length from edges</p></li>
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<li class=kadov-p><p>Non conform mesh allowed</p></li>
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</ul>
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</ol>
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<p> </p>
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<p>The choice of a hypothesis depends on:</p>
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<ul type="disc" class="whs2">
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<li class=kadov-p><p>the geometrical object (shape) which will be meshed</p></li>
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<li class=kadov-p><p>the algorithm, which will be selected for meshing
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of this geometrical object (shape)</p></li>
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</ul>
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<p> </p>
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