[esp-r] Re: CFD problem - cannot get results SOLVED - thanks to the ESP-r community!

[Jon Hand]

This is a great use of the ESP-r list!
Newbies (and PhD students) on this list might consider  -

  Learning often involves hitting your head against the wall.  Hitting your head a 2nd time also
  happens and it is natures way of telling you that NOW would be a good time to talk to
  other people (even your supervisor).  Hitting your head a 3rd time is << fill in your own *!%! >>.

Someone else might recognize the issue and have already know a work-around. 
And you might not get an answer or it might take a while...  And there is quite a bit
of knowledge in the community....so give it a try.  

And to embed that knowledge - especially on topics such as CFD if this model
proves to be working well and is understandable consider contributing it for
inclusion as a well-documented exemplar.

-Jon Hand
________________________________________
From: esp-r-bounces at lists.strath.ac.uk [esp-r-bounces at lists.strath.ac.uk] On Behalf Of Andrew Cowie [cn06arc at leeds.ac.uk]
Sent: 30 August 2012 14:59
To: esp-r at lists.strath.ac.uk
Subject: [esp-r] Re: CFD problem - cannot get results SOLVED

Hi all,

Problem solved.  Turns out that type 2 termal conflation specifically is outdated and clearly now unsupported.  In order to achieve the result of type 2 thermal conflation, you need to change the conflation to 4 (or 5) in the CFD input file; then everything (including results reporting) works like a dream.  Another ESP-r newbie-trap identified and crushed.

Gratefull thanks to Dr Aizaz Samuel for this solution.

Andy Cowie

________________________________________
From: esp-r-bounces at lists.strath.ac.uk [esp-r-bounces at lists.strath.ac.uk] On Behalf Of Andrew Cowie [cn06arc at leeds.ac.uk]
Sent: 28 August 2012 18:36
To: esp-r at lists.strath.ac.uk
Subject: [esp-r]  CFD problem - cannot get results

Hi all,

I''ve recently delved into the convoluted realm of CFD within ESP-r, and am having terrible trouble coaxing results from it.  I cannot find any guidance for this problem anywhere (cookbook, tutorials, exemplar models, etc) so my last hope is you guys.  First, the basics:
OS: 64-bit CentOS 5.8
ESP-r: "Release branch" Release 11.11, revision 8518, compiled with GNU compilers (have tried with both X11 and GTK graphics libraries)

Now, the problem: I am trying to use type 2 thermal conflation (i.e. get point air temps from CFD).  I have worked out the input procedure without a problem, can run type 1 thermal conflation without a problem, and get results.  The problem arrises when i try to get results from a type 2 thermally conflated analysis.  To minimize confusion I'll go through it step by step:

 *
I select "CFD" from the res module main menu, point it to the CFD library, and it reads it in without a problem.
 *
I create a view; first I input a name and a direction, then it asks "Which X layer".  At this point, if i put in any integer above 1 (say 5 as an example), it says: "The input value for ' Slice number' (5) should be less than 0! Please re-enter."
 *
So i try an integer less than 0 (say -2) and it says: "The input value for ' Slice number' (-2) should be greater than 1! Please re-enter."
 *
I have tried 1 and 0, and they just result in the same error messages respectively.  Decimals just result in the text input box resetting.
 *
The ONLY way past this step i have found is to press "use default", in which case it uses 1 but somehow accepts it.
 *
After selecting a resolution the view is created, and appears in the interface.
 *
When i now select "create image(s)", it does not work, no matter what image format i use.  On-screen graphs ("screen2d" option) are blank, TEC and paraview files are blank, bitmaps are corrupted, and XPM just crashes the program and throws up a shell msg "Segmentation fault".

Is there any other way that i can get local air temperature results from the CFD?  I've tried timestep reports but with type 2 thermal conflation all the temperatures are NaN.  This has been holding me up for weeks, if anyone can help in any way id be greatly appreciative.



Thanks in anticipation,

Andy Cowie

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