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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">the point is that in GetDP it’s not allowed to subtract or add anything from/to<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">a Dof in a single Galerkin statement. Therefore you have to split your 2nd
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Galerkin into two:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img width="662" height="95" id="Bild_x0020_1" src="cid:image001.png@01CFF852.565D1020"></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Then it works
</span><span lang="EN-US" style="font-size:11.0pt;font-family:Wingdings;color:#1F497D">J</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img width="622" height="486" id="Bild_x0020_2" src="cid:image002.png@01CFF852.565D1020"></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Michael<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> getdp [mailto:getdp-bounces@ace20.montefiore.ulg.ac.be]
<b>On Behalf Of </b>Hamid Badi<br>
<b>Sent:</b> Tuesday, November 04, 2014 1:14 PM<br>
<b>To:</b> getdp-public@googlegroups.com<br>
<b>Subject:</b> [Getdp] Multiple natural boundary conditions<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hello,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">My problem is common, i'd like to solve the heat equation with, for example, 2 natural Robin BC and one adibatique BC : -lambda.dnT = h.(T-Ti) on Gamma_i with i={1,2} and lambda.dnT = 0 on Gamma_3. <o:p></o:p></p>
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<p class="MsoNormal">I write the weak form with u in Form0 of the heat equation leads to the classical form :<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="background:#FAFAFA"><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">Equation</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">{</span></span><span style="font-size:10.0pt;font-family:"Courier New";color:black"><br>
<span class="styled-by-prettify"> </span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">Galerkin</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">{</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">[</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#000088">lambda</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">[]</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">*</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">Dof</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">{</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">Grad</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
u</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">},</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">{</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">Grad</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
u</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">}];</span></span><span style="font-size:10.0pt;font-family:"Courier New";color:black"><br>
<span class="styled-by-prettify"> </span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">In</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">Omega</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">;</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">Jacobian</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">JVol</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">;</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">Integration</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> I1</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">;}</span></span><span style="font-size:10.0pt;font-family:"Courier New";color:black"><br>
<span class="styled-by-prettify"> </span><br>
<span class="styled-by-prettify"> </span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">Galerkin</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">{</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">[</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> h</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">[]*</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">(</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">Dof</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">{</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">u</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">}</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">-</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> T</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">[]),</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">{</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">u</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">}];</span></span><span style="font-size:10.0pt;font-family:"Courier New";color:black"><br>
<span class="styled-by-prettify"> </span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">In</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">Ambiance</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">;</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">Jacobian</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">JSur</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">;</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black">
</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#660066">Integration</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:black"> I1</span></span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">;}</span></span><span style="font-size:10.0pt;font-family:"Courier New";color:black"><br>
</span><span class="styled-by-prettify"><span style="font-size:10.0pt;font-family:"Courier New";color:#666600">}</span></span><span style="font-size:10.0pt;font-family:"Courier New""><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">In my problem there is no essential BC so i do not have Constraint block.<o:p></o:p></p>
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<p class="MsoNormal">The computation give a 0 temperature field, I do not understand what's wrong.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Moreover : <o:p></o:p></p>
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<p class="MsoNormal">1 - I wan to store in a file the temperature field respects to the nodes but PostOperation block computes over elements.<o:p></o:p></p>
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<p class="MsoNormal">2 - How can I compute the integral of the flux over Gamma_i, to do so, I need for each boundary edge : the flux and the normal vector<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Best regards.<o:p></o:p></p>
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