<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>You are a patient saint, DB...<br><br>Sent from my iPhone</div><div><br>On Mar 13, 2013, at 9:29 PM, David BRADLEY <<a href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>> wrote:<br><br></div><blockquote type="cite"><div>
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Jihad,<br>
CFD stands for Computational Fluid Dynamics. CFD Software packages
are highly complex and seek to determine air flows by breaking up
air volumes into millions and millions of finite elements; each
finite element's momentum is described by the Navier Stokes
equations. While TRNSYS can connect with Fluent (one particular CFD
tool), it does not have a CFD package built in. Cosimulation between
TRNSYS and a CFD is a very rarely used technique and is almost never
used in building simulation because of the enormous time needed to
solve the flow problem. <br>
<br>
I think it would be wise to find a TRNSYS expert who can assist you
in defining the problem that you want to simulate and to determine
whether you really need to know the speed of air flowing through
your building. If interzonal air flows are needed at all then
simplified approaches are used (TRNFlow, CONTAM, etc.). I want to
stress, however, that even these simplified techniques are quite
complicated to implement, are not for TRNSYS beginners and more
often than not, are unnecessary except for complex spaces such as
atria and for natural ventilation studies. <br>
<br>
Regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 3/13/2013 11:11, jihad alaoui sosse
wrote:<br>
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<blockquote cite="mid:CAAhOvJRS7yPP08TOafwkrSXDBtWSvWviQpi3B2ub5KNXyU5oNA@mail.gmail.com" type="cite">
<div dir="ltr"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"><font size="-1"> thanks
but when i can
find the <font face="Arial"> CFD
software</font><font style="font-family:Arial" size="-1">s on my instalation</font><font style="font-family:Arial" size="-1">.</font></font></font></font></font></font></font></font></font></font> <br>
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<div style="margin:0cm 0cm 0pt;text-align:left"><b><i><span style="color:rgb(31,73,125);font-family:"Times
New Roman","serif";font-size:10pt">Jihad
Alaoui Sosse</span></i></b></div>
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<p style="margin:0cm 0cm 0pt"><span style="color:rgb(31,73,125);font-family:"Book
Antiqua","serif"">Ingénieur d'étude</span></p>
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<p style="margin:0cm 0cm 0pt;text-align:left"><i><span style="color:rgb(31,73,125);font-family:"Times New
Roman","serif"">Département Energie <br>
</span></i></p>
<p style="margin:0cm 0cm 0pt;text-align:left">
<i><span style="color:rgb(31,73,125);font-family:"Times
New Roman","serif"">Tél : O648883325 ;</span></i></p>
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New Roman","serif"">Courriel : <a moz-do-not-send="true" href="mailto:sys.energie@gmail.com" target="_blank">sys.energie@gmail.com</a></span></i></b></p>
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New Roman","serif"">Site web : <u><a moz-do-not-send="true" title="http://www.novec.ma/
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<p style="margin:0cm 0cm 0pt;text-align:left"><b><i><span style="color:lime;font-family:Webdings">P</span></i></b><b><i><span style="color:green;font-family:Webdings"> </span></i></b><b><i><span style="color:rgb(31,73,125);font-family:"Times
New Roman","serif"">Avant d'imprimer,
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<pre wrap="">_______________________________________________
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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