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      <title>QBDY3</title>
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      <div class="title_refTopic" id="xps10_pagetitle">QBDY3 </div>
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      <h4 class="refClassification">Boundary Heat Flux Load for a Surface </h4>
      <p class="para_refTopic">Defines a uniform heat flux load for a boundary surface. </p>
      <div class="title_refCategory">Format: </div>
      <div class="refCategoryContent">
         <table border="1" width="100%" align="center">
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                     <p class="para_th">1 </p>
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                     <p class="para_th">2 </p>
                  </th>
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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_th">6 </p>
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                     <p class="para_th">7 </p>
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                     <p class="para_th">8 </p>
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                     <p class="para_th">9 </p>
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                     <p class="para_th">10 </p>
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            </thead>
            <tbody>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">QBDY3 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">SID </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">Q0 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">CNTRLND </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">EID1 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">EID2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">EID3 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">EID4 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">EID5 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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                     <p class="para_td">&nbsp; </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">EID6 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">etc. </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
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                  <td align="center" colspan="1" rowspan="1">
                     <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>
                  </td>
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                     <p class="para_td">&nbsp; </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
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         </table><br></div>
      <div class="title_refCategory">Example: </div>
      <div class="refCategoryContent">
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            <tbody>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">QBDY3 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">20.0 </p>
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                     <p class="para_td">10 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">1 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">THRU </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">50 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">BY </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">2 </p>
                  </td>
                  <td align="center" colspan="1" rowspan="1">
                     <p class="para_td">&nbsp; </p>
                  </td>
               </tr>
            </tbody>
         </table><br></div>
      <div class="title_refCategory">Fields:</div>
      <div class="refCategoryContent">
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                     <p class="para_th"><b class="uiTerm">Field </b></p>
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                  <th align="left" colspan="1" rowspan="1">
                     <p class="para_th"><b class="uiTerm">Contents </b></p>
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            <tbody>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">SID </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Load set identification number.  (Integer &gt; 0) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Q0 </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Thermal heat flux load, or load multiplier.  Q0 is positive for heat flow into a surface.  (Real) </p>
                  </td>
               </tr>
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                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">CNTRLND </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">Control point for thermal flux load.  (Integer &ge; 0; Default=0) </p>
                  </td>
               </tr>
               <tr>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">EIDi </p>
                  </td>
                  <td align="left" colspan="1" rowspan="1" valign="top">
                     <p class="para_td">CHBDYj element identification numbers.  (Integer &ne; 0 or &ldquo;THRU&rdquo; or &ldquo;BY&rdquo;) </p>
                  </td>
               </tr>
            </tbody>
         </table><br></div>
      <div class="title_refCategory">Remarks: </div>
      <div class="refCategoryContent">
         <ol type="1" start="1">
            <li>
               <p class="para_item">QBDY3 entries must be selected in Case Control (LOAD=SID) to be used in steady state.  The total power into a surface is given by the equation: </p>
               <ul>
                  <li>
                     <p class="para_item">if CNTRLND &le; 0 then <em>P<sub class="subscript">in</sub></em>=(Effective area) ·<em>Q</em>0 
                     </p>
                  </li>
                  <li>
                     <p class="para_item">if CNTRLND &gt; 0 then<em>P<sub class="subscript">in</sub></em>=(Effective area) ·<em>Q</em>0 · <em>u</em><sub class="subscript">CNTRLND</sub></p>
                     <p class="para_item">where <em>u</em><sub class="subscript">CNTRLND</sub> is the temperature of the control point and is used as a load multiplier. 
                     </p>
                  </li>
               </ul>
            </li>
            <li>
               <p class="para_item">In transient analysis SID is referenced by a TLOADi Bulk Data entry through the DAREA entry.  A function of time <em>F</em>(<em>t</em>−&tau;) defined on the TLOADi multiplies the general load, with &tau; specifying time delay.  The load set identifier on the TLOADi entry must be selected in Case Control (DLOAD=SID) for use in transient analysis.  If multiple types of transient loads exist, they must be combined by the DLOAD Bulk Data entry. 
               </p>
            </li>
            <li>
               <p class="para_item">The CNTRLND multiplier cannot be used with any higher-order elements. </p>
            </li>
            <li>
               <p class="para_item">When using &ldquo;THRU&rdquo; or &ldquo;BY&rdquo;, all intermediate CHBDYE, CHBDYG, or CHBDYP elements must exist. </p>
            </li>
         </ol>
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