[Nek5000-users] Periodic B.C and Genmap Issue

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

There should normally be two spaces after each bc in genbox.

Regarding format in the .rea file, this is a problem with
mixed characters + numbers on the same input line, particularly
when the input character string supports blanks.

I typically resolve the issue by looking at the source.
In this case, connect2.f in the nek/ repo indicates:


                IF (NELGT.LT.1000) THEN
                   READ(9,50,ERR=500,END=500)
      $            CHTEMP,
      $            CBC(ISIDE,IEL,IFIELD),ID1,ID2,
      $            (BC(II,ISIDE,IEL,IFIELD),II=1,NBCREA)
    50             FORMAT(A1,A3,2I3,5G14.6)
                ELSEIF (NELGT.LT.100000) THEN
                   READ(9,51,ERR=500,END=500)
      $            CHTEMP,
      $            CBC(ISIDE,IEL,IFIELD),ID1,ID2,
      $            (BC(II,ISIDE,IEL,IFIELD),II=1,NBCREA)
    51             FORMAT(A1,A3,I5,I1,5G14.6)
                ELSEIF (NELGT.LT.1000000) THEN
                   READ(9,52,ERR=500,END=500)
      $            CHTEMP,
      $            CBC(ISIDE,IEL,IFIELD),ID1,
      $            (BC(II,ISIDE,IEL,IFIELD),II=1,NBCREA)
    52             FORMAT(A1,A3,I6,5G14.6)
                ELSE


...


Paul



On Thu, 24 Jun 2010, nek5000-users at lists.mcs.anl.gov wrote:

> Hi Paul,
>
> I am having a similar problem.
> I am trying to generate a mesh for a 3D periodic channel flow with periodic
> boundary conditions in x and z directions and walls on the y direction.
> I use genbox and then genmap. But i got the same error of Shriram.
> Note that i am having problems when i am using double periodic BCs :
> P  ,P  ,W  ,W  ,P  ,P
> but single BCs works fine :
> P  ,P  ,W  ,W  ,W  ,W
> W  ,W  ,W  ,W  ,P  ,P
> W  ,W  ,P  ,P  ,W  ,W
>
> Do you have a work around or a suggestion?
>
> Thank you
> francesco
>
>
>
> My error is
>
>
> reading .rea file data ...
> reading .re2 file data ...
> start locglob_lexico:           8         512        4096
>   0.2000000000000000
> locglob:           1           1        4096
> locglob:           2           9        4096
> locglob:           3          81        4096
> locglob:           1         729        4096
> locglob:           2         729        4096
> locglob:           3         729        4096
> locglob:           1         729        4096
> locglob:           2         729        4096
> locglob:           3         729        4096
> done locglob_lexico:       729       729      4096         8
> start periodic vtx:         512         729
>         1 1  5  3  0.00000000E+00        1 shift
>
> abort: PERIODIC MISMATCH 2:
>        1  5 P    ie
>      449  6 P		  je
>    449.0000000000000       0.0000000000000000E+000 bc
>
>
> My .box file is :
>
>
> turbChannel.rea
> 3                       spatial dimension
> 1                       number of fields
> #
> #       comments:       This is the box immediately behind the
> #                       refined cylinder in Ugo’s cyl+b.l. run.
> #
> #
> #========================================================
> #
> Box 1                           Pipe
> -8 -8 -8                        Nelx Nely Nelz
> 0.0   6.28   1.0                x0 x1   ratio
> -1.0   1.0    1.0               y0 y1   ratio
> 0.0   3.14   1.0                z0 z1   ratio
> P  ,P  ,W  ,W  ,P  ,P           BC’s: (cbx0, cbx1, cby0, cby1, cbz0, cbz1)
>
>
>
>
>
>
>
> -----Original Message-----
> From: nek5000-users-bounces at lists.mcs.anl.gov on behalf of nek5000-users at lists.mcs.anl.gov
> Sent: Thu 6/24/2010 6:22 PM
> To: nek5000-users at lists.mcs.anl.gov
> Subject: [Nek5000-users] Periodic B.C and Genmap Issue
>
> Hi Paul,
>
> This post is in reference to the previous post by Michael (dated Jun 22).
> When I try to get a map file for a rea file that has periodic vertices, I
> get the following error. The rea file was generated the same way as before
> (Gambit -> Nek through Matlab). I checked on Matlab by plotting the periodic
> vertices and confirmed for a few faces that they are indeed periodic. Also,
> as you had earlier suggested (with the new genmap), I tried changing the
> tolerances fro 0.09 to 0.2 and I get the same periodic mismatch error. Could
> you provide any leads on where things are going wrong  ? Please find below
> the error message. Thanks.
>
> <error>
> Input (.rea) file name:
> domain
> Input mesh tolerance (default 0.2):
> NOTE: smaller is better, but generous is more forgiving for bad meshes.
> 0.09
> reading .rea file data ...
> start locglob_lexico:           8        3912       31296
> 8.99999999999999967E-002
> locglob:           1           1       31296
> locglob:           2          36       31296
> locglob:           3        1224       31296
> locglob:           1        4851       31296
> locglob:           2        4851       31296
> locglob:           3        4851       31296
> locglob:           1        4851       31296
> locglob:           2        4851       31296
> locglob:           3        4851       31296
> done locglob_lexico:      4851      4851     31296        10
> start periodic vtx:        3912        4851
>
> abort: PERIODIC MISMATCH 2:
>     1093  1 P    ie
>        0  1   je
>  4.14470000000000029E-003   0.0000000000000000       bc
>
>
>           8  quit
>
> </error>
>
>
> Regards
> Shriram
>
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