[Nek5000-users] pipe prenek

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

Dear ZJ,


In order to parse the characters in the line, nek uses formatted reads for

curve sides and for BC info.


The format changes as the number of elements increases in order to accommodate the larger integers (i.e., the element number) in the same line,

so you have to check either the reader source or prenek source or a valid

.rea file to see what that formatting looks like.


I've fixed your pipe mesh here.  Note that there is a 2D pipe mesh (but with a different base template) in NekExamples/pipe/w2dcyl020a.rea


Paul


________________________________
From: Nek5000-users <nek5000-users-bounces at lists.mcs.anl.gov> on behalf of nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
Sent: Wednesday, October 18, 2017 4:48:38 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: [Nek5000-users] pipe prenek

Hi Nek,

Is there anyone knows how to calculate the curvature in .rea file. Recently, I want to generate a pipe mesh but it doesn't seem like a pipe in which I guess there is something wrong in curvature part in .rea file. I have attached the mesh part below.

  **MESH DATA** 1st line is X of corner 1,2,3,4. 2nd line is Y.
        12         2        12 NEL,NDIM,NELV
      ELEMENT          1 [    1A]    GROUP     0
   0.000000      0.350000       0.250000       0.000000
   0.000000      0.000000       0.250000       0.350000
      ELEMENT          2 [    1B]    GROUP     0
   0.500000      0.353554       0.250000       0.350000
   0.000000      0.353554       0.250000       0.000000
      ELEMENT          3 [    1C]    GROUP     0
   0.000000      0.000000       0.250000       0.353554
   0.500000      0.350000       0.250000       0.353554
      ELEMENT          4 [    1A]    GROUP     0
   0.000000      0.000000       0.250000       0.350000
   0.000000     -0.350000      -0.250000       0.000000
      ELEMENT          5 [    1B]    GROUP     0
   0.000000      0.353554       0.250000       0.000000
  -0.500000     -0.353554      -0.250000      -0.350000
      ELEMENT          6 [    1C]    GROUP     0
   0.500000      0.350000       0.250000       0.353554
   0.000000      0.000000      -0.250000      -0.353554
      ELEMENT          7 [    1A]    GROUP     0
   0.000000     -0.350000      -0.250000       0.000000
   0.000000      0.000000      -0.250000      -0.350000
      ELEMENT          8 [    1B]    GROUP     0
  -0.500000     -0.353554      -0.250000      -0.350000
   0.000000     -0.353554      -0.250000       0.000000
      ELEMENT          9 [    1C]    GROUP     0
   0.000000      0.000000      -0.250000      -0.353554
  -0.500000     -0.350000      -0.250000      -0.353554
      ELEMENT         10 [    1A]    GROUP     0
   0.000000      0.000000      -0.250000      -0.350000
   0.000000      0.350000       0.250000       0.000000
      ELEMENT         11 [    1B]    GROUP     0
   0.000000     -0.353554      -0.250000       0.000000
   0.500000      0.353554       0.250000       0.350000
      ELEMENT         12 [    1C]    GROUP     0
  -0.500000     -0.350000      -0.250000      -0.353554
   0.000000      0.000000       0.250000       0.353554
  ***** CURVED SIDE DATA *****
         8 Curved sides follow IEDGE,IEL,CURVE(I),I=1,5, CCURVE
  1  2  0.50000   0.00000       0.00000       0.00000       0.00000     C
  4  3  0.50000   0.00000       0.00000       0.00000       0.00000     C
  1  5  0.50000   0.00000       0.00000       0.00000       0.00000     C
  4  6  0.50000   0.00000       0.00000       0.00000       0.00000     C
  1  8  0.50000   0.00000       0.00000       0.00000       0.00000     C
  4  9  0.50000   0.00000       0.00000       0.00000       0.00000     C
  1 11  0.50000   0.00000       0.00000       0.00000       0.00000     C
  4 12  0.50000   0.00000       0.00000       0.00000       0.00000     C


Kind regards,

ZJ
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