<div>Carney, </div>
<div> </div>
<div>I'm also among the group of people who are not too comfortable with CFD results from tools like IES-VE and Designbuilder. These are primarily energy modeling tools with built in CFD applications. However they provide a seamless environment (for Energy modeling and CFD) and have easy to understand user interface but I feel the main problem is with 'automatic meshing' that these software offer. Meshing is a critical component of the CFD process and it would be hard to automatically generate right kind of mesh for infinite variations of geometry and operating conditions. </div>
<div> </div>
<div>To obtain correct CFD results we must check mesh convergence, may be these tools have algorithm which create very fine mesh to start with and hence they take a long time to produce results. Improving hardware capacity like JRR and Zhoulum suggested is essential but its also critical to create right kind of mesh to get quick results. This is especially critical for building application since the volume of analysis zone is usually huge, if we mesh it improperly then we can end up waiting for an year even on 32 machine cluster or a powerful Xeon server. </div>
<div> </div>
<div>In my opinion also stand alone CFD tools like Fluent, Phoenics, CFX, StarCD etc. are much better CFD tools than IES-VE. Even if you would like to use IES-VE it would be prudent to test a few cases of your analysis and compare results with established stand alone CFD tools. </div>
<div> </div>
<div>There are also CFD tools specific for building applications like Fluent-Airpak and Flovent which are customized for building applications. These tools are easy to understand for building engineers and produce good results. Another good option can be OpenSource CFD libraries like OpenFoam, FDS etc. However the problem there is that learning curve with OpenSource platforms is rather slow. </div>
<div> </div>
<div>Regards</div>
<div>Shishir</div>
<div> </div>
<div>------------</div>
<div><a href="http://www.mechartes.com/">www.mechartes.com</a></div>
<div> </div>
<div> </div>
<div><br> </div>
<div class="gmail_quote">2009/2/27 CARNEY Ronan <span dir="ltr"><<a href="mailto:Ronan.CARNEY@projectservices.qld.gov.au">Ronan.CARNEY@projectservices.qld.gov.au</a>></span><br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div><br>
<p><font face="Arial" size="2">Dear all,</font> </p><br>
<p><font face="Arial" size="2">I am writing to you to ask for your personal preference on which CFD software package I should use for all the following (as one) and your reason why;</font></p>
<p><font face="Arial" size="2">A) Large Scale City Analysis of wind turbulence and velocity</font> <br><font face="Arial" size="2">B) Internal and external analysis (combined)</font> <br><font face="Arial" size="2">C) CFD for Urban Design.</font> </p>
<p><font face="Arial" size="2">Currently we use IES-VE for CFD analysis but from what I've heard, the general consensus is that, it may not be near accurate enough. In addition, the computational time is far too long. </font></p>
<br>
<p><b><i><font face="Times New Roman" color="#000080" size="2">Regards,</font></i></b><i></i><br><b></b><b><i></i></b><b><i><font face="Times New Roman">Ronan Carney</font></i></b><i></i><br><font face="Complex" size="1">Electrical Engineer</font><br>
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