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<font size="-1"><font face="Arial">Dear Stefano,<br>
<br>
The wall thickness is limited to 1 meter in TRNBUILD.<br>
<br>
You say condition does not fulfill the stability criteria, but
have you try to increase your TIME BASE in TRNBUILD (TRNBUILD -
Outputs - TIME BASE)?<br>
<br>
I suggest you to increase you time base and check if results are
physicaly correct. Time base must be a mutliple of your time
step.<br>
<br>
Best regards<br>
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<td colspan="2"><font size="2" color="#000000"
face="CALIBRI">Adrien JEZEQUEL<br>
Simulations Thermiques Dynamiques</font></td>
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Le 21/03/2011 18:15, Avesani Stefano a écrit :
<blockquote
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<p class="MsoNormal">Dear all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I need to simulate the behavior of a
building with big thermal mass (old church, circa 90 cm stone
wall).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Unfortunately, this condition does not
fulfill the stability criteria.<o:p></o:p></p>
<p class="MsoNormal">Which is the best way to simulate this
case? Would it make sense to create another adjacent thermal
zone with no air mass capacitance and with the external wall
as half of the massive original wall?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for helping and suggestions<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Stefano<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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