[Nek5000-users] First Visit file

[nek5000-users at lists.mcs.anl.gov]

Hello,


If you run

  head -1 r1492_n08.fld27  | strings | head -1

you will see the output variable codes 'U P ' in the file header

 140   8   8   8 5.0101000E+0250101 U P                             4 NELT,NX,N 

which means there are only velocity and pressure fields in the file.  As Paul suggested, in order to get coordinates for visit, you need to rerun the case with 

  T      COORDINATES

and at least with NSTEPS=0 in .rea

Best,
Aleks



----- Original Message -----
From: nek5000-users at lists.mcs.anl.gov
To: nek5000-users at lists.mcs.anl.gov
Sent: Thursday, January 6, 2011 9:47:07 AM
Subject: Re: [Nek5000-users] First Visit file


Hi,

I'm not certain that r1492... has the requisite geometry
in the .fld file.  (nek5000 and postx do not require it)

Also, it might be a good idea to start w/ .fld01, so I
would suggest actually running the case and generating
a sequence of a few .fld files (at least one).  Nek5000
will put the geometry in .fld01 by default.

Then, execute the following script:

-----------------------------------------------------------------------------

#! /usr/bin/tcsh
#
  set base = `head -1 SESSION.NAME`

  echo '\n Generating '$base'.nek3d file ...'

  set nfld = `ls $base.fld* | wc -l`

#echo $base  ' '  $nfld

  echo 'NEK3D'                           >  $base.nek3d
  echo 'filetemplate: '$base'.fld%02d'   >> $base.nek3d
  echo 'firsttimestep: 1'                >> $base.nek3d
  echo 'numtimesteps: '$nfld             >> $base.nek3d
  echo 'meshcoords: 1'                   >> $base.nek3d

  echo '\n Assuming that coordinates are in '$base'.fld01 -- otherwise edit $base.nek3d file ...'
  echo '\n Total : '$nfld' file(s)  ... Done \n'

# Extra lines?
#
# version: 1.0
# endian: big

#ls `head -1 SESSION.NAME`0.f[0-9][0-9][0-9][0-9]* | wc -l

-----------------------------------------------------------------------------

which will make a blah.nek3d file for session name "blah"
(assuming blah is in your SESSION.NAME file).

>From this you can run visit and load blah.nek3d


Paul




On Thu, 6 Jan 2011, nek5000-users at lists.mcs.anl.gov wrote:

> Hi,
>
> I am trying to open the binary example file in /nek5_svn/examples/vortex
> named r1492_n08.fld27 but i received the following error message:
>
> VisIt could not read from the file
> "/home/alex/Documents/nek5_svn/examples/vortex/r1492_n08.fld27".
>
> The generated error message was:
>
> There was an error
> opening /home/alex/Documents/nek5_svn/examples/vortex/r1492_n08.fld27.
> It may be an invalid file. VisIt tried using the following file format
> readers to open the file: Silo
>
> To check if visit was working fine I generated a bov ASCII file and open
> it with no problems.
>
> Thanks.
>
>
> _______________________________________________
> Nek5000-users mailing list
> Nek5000-users at lists.mcs.anl.gov
> https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users
>
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