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      <title>FLSYM</title>
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      <div class="title_refTopic" id="xps10_pagetitle">FLSYM </div>
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      <h4 class="refClassification">Axisymmetric Symmetry Control </h4>
      <p class="para_refTopic">Defines the relationship between the axisymmetric fluid and a structural boundary having symmetric constraints. The purpose is to allow fluid boundary matrices to conform to structural symmetry definitions. </p>
      <div class="title_refCategory">Format: </div>
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                     <p class="para_th">1 </p>
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                     <p class="para_th">2 </p>
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                     <p class="para_th">3 </p>
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                     <p class="para_th">4 </p>
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                     <p class="para_th">5 </p>
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                     <p class="para_td">FLSYM </p>
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                     <p class="para_td">M </p>
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                     <p class="para_td">S1 </p>
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                     <p class="para_td">S2 </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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      <div class="title_refCategory">Example: </div>
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                     <p class="para_td">FLSYM </p>
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                     <p class="para_td">12 </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">S </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">A </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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      <div class="title_refCategory">Fields:</div>
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                     <p class="para_th"><b class="uiTerm">Field </b></p>
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                     <p class="para_th"><b class="uiTerm">Contents </b></p>
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                     <p class="para_td">M </p>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Number of symmetric sections of structural boundary around the circumference of the fluid being modeled by the set of structural elements.  (Even Integers &ge; 2) </p>
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                     <p class="para_td">S1, S2 </p>
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                     <p class="para_td">Description of boundary constraints used on the structure at the first and second planes of symmetry.  (Character:  &ldquo;S&rdquo; means symmetric, &ldquo;A&rdquo; means antisymmetric.) </p>
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      <div class="title_refCategory">Remarks: </div>
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            <li>
               <p class="para_item">This entry is allowed only if an AXIF entry is also present. </p>
            </li>
            <li>
               <p class="para_item">Only one FLSYM entry is allowed. </p>
            </li>
            <li>
               <p class="para_item">This entry is not required if there are no planes of symmetry. </p>
            </li>
            <li>
               <p class="para_item">First plane of symmetry is assumed to be at &phi; = 0.  Second plane of symmetry is assumed to be at &phi; = 360&deg; / <em>M</em>. 
               </p>
            </li>
            <li>
               <p class="para_item">Symmetric and antisymmetric constraints for the structure must, in addition, be provided by the user. </p>
            </li>
            <li>
               <p class="para_item">The solution is performed for those harmonic indices listed on the AXIF entry that are compatible with the symmetry conditions. </p>
            </li>
            <li>
               <p class="para_item">For example, if FLSYM is used to model a quarter section of structure at the boundary, M = 4.  If the boundary constraints are &ldquo;SS&rdquo;, the compatible cosine harmonics are 0, 2, 4, ..., etc.  If &ldquo;SA&rdquo; is used, the compatible cosine harmonics are 1, 3, 5, ..., etc. </p>
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