doc/salome/gui/SMESH/files/about_hypotheses.htm

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   6 <title>About hypotheses</title>
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  92 <h1>About hypotheses</h1>
  93
  94 <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
  95  boundary conditions which will be taken into account at calculations of
  96  meshes or submeshes basing on geometrical objects. These hypotheses allow
  97  you to manage the level of detail of the resulting meshes or submeshes:
  98  when applying different hypotheses with different parameters you can preset
  99  the quantity of meshing elements which will compose your mesh. So, it
 100  will be possible to generate a rough or a more refined mesh or submesh.
 101  </p>
 102
 103 <p>&nbsp;</p>
 104
 105 <p>In <span style="font-weight: bold;"><B>MESH </B></span>there are the following
 106  Basic Hypotheses (to introduce them, you operate numerical values):</p>
 107
 108 <ul type="disc" class="whs2">
 109
 110         <li style="list-style: circle; /*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
 111                 type=circle
 112                 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>
 113
 114         <ul type="disc" class="whs2">
 115
 116                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
 117                         class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#arithmetic_1D">Arithmetic 1D</a></p></li>
 118
 119                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
 120                         class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#Average_length">Average Length</a></p></li>
 121
 122                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
 123                         class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#deflection_1D">Deflection 1D </a></p></li>
 124
 125                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
 126                         class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#Number_of_elements">Number of segments</a></p></li>
 127
 128                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
 129                         class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#start_and_end_length">Start and end length</a></p></li>
 130
 131                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
 132                         class=kadov-p><p class="whs3"><a href="arithmetic_1d.htm#automatic_length">Automatic Length</a></p></li>
 133         </ul>
 134
 135         <li style="list-style: circle; /*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
 136                 type=circle
 137                 class=kadov-p><p class="whs3"><a href="max._element_area_hypothesis.htm">2D Hypotheses</a> (for meshing
 138  of <span style="font-weight: bold;"><B>faces)</B></span>: </p></li>
 139 </ul>
 140
 141 <ol type="disc" class="whs4">
 142
 143         <ul type="disc" class="whs2">
 144
 145                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
 146                         class=kadov-p><p class="whs3"><a href="max._element_area_hypothesis.htm#max_element_area">Max Element Area</a></p></li>
 147
 148                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
 149                         class=kadov-p><p class="whs3"><a href="max._element_area_hypothesis.htm#length_from_edges">Length from
 150  Edges</a></p></li>
 151
 152                 <li style="/*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
 153                         class=kadov-p><p class="whs3"><a href="max._element_area_hypothesis.htm#quadrangle preference">Quadrangle
 154  Preference</a></p></li>
 155         </ul>
 156 </ol>
 157
 158 <ul type="disc" class="whs2">
 159
 160         <li style="list-style: circle; /*begin!kadov{{*/ color: #000000; /*}}end!kadov*/ "
 161                 type=circle
 162                 class=kadov-p><p class="whs3">3D
 163  Hypothesis (for meshing of <span style="font-weight: bold;"><B>volumes)</B></span>:
 164  </p></li>
 165
 166         <ul type="disc" class="whs2">
 167
 168                 <li class=kadov-p><p><a href="max._element_volume_hypothsis.htm">Max
 169  Element Volume</a></p></li>
 170         </ul>
 171 </ul>
 172
 173 <p>&nbsp;</p>
 174
 175 <p>There also exist some <a href="non_conform_mesh_allowed_hypothesis.htm">Additional
 176  Hypotheses</a></p>
 177
 178 <ul type="disc" class="whs2">
 179
 180         <ul type="disc" class="whs2">
 181
 182                 <li class=kadov-p><p>Propagation of 1D Hypothesis on opposite edges</p></li>
 183
 184                 <li class=kadov-p><p>Non conform mesh allowed</p></li>
 185
 186                 <li class=kadov-p><p>Quadratic mesh</p></li>
 187         </ul>
 188 </ul>
 189
 190 <p>&nbsp;</p>
 191
 192 <p>The choice of a hypothesis depends on:</p>
 193
 194 <ul type="disc" class="whs2">
 195
 196         <li class=kadov-p><p>the geometrical object (shape) which will be meshed</p></li>
 197
 198         <li class=kadov-p><p>the algorithm, which will be selected for meshing
 199  of this geometrical object (shape)</p></li>
 200 </ul>
 201
 202 <p>&nbsp;</p>
 203
 204 <p>&nbsp;</p>
 205
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