[esp-r] Re: CFD problem - cannot get results

[Jon Hand]

My guess is that there are a few lines of code in the interface dialogues and in the
graphics for CFD reporting that are sensitive to 64bit value passing between fortran and c.

The NAN is not related to the interface choices - that is in the solution but I could
imagine that the reporting has no idea how to plot NANs.   Compiling with the
extra debug option might allow it to identify numerical glitches.

There should be a simulation trace function in the simulator which, like
other trace functions will write out intermediate calculation information 
as the simulation progresses. I have not used that but it might give some
valuable clues.

One alternative, if you have access to a 32 bit Linux is to try and run it
on that to see if the reporting works better. 

Also - a number of changs were made a few weeks ago to the development_branch
be sure to issue an svn update command to ensure that your source is up to date.

-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: 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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