[Nek5000-users] Trouble using cylindrical mesh

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

Hello all,

I have a few problems when using the blah.box template from the Nek 5000 
Primer guide for cylindrical meshes.
Here is the error message I get:

===================================================================================

Number of processors:           1
 REAL    wdsize      :           8
 INTEGER wdsize      :           4


  Beginning session:
  
/home/loiseau/BricoNek/Cylindre/Cylindre.rea                                  


 
 timer accuracy:   0.0000000E+00 sec

 read .rea file
 nelgt/nelgv/lelt:       72       72       80
 lx1  /lx2  /lx3 :        6        4        4

 mapping elements to processors
           0          72          72          72          72  NELV
 RANK     0 IEG       1       2       3       4       5       6       
7       8
                      9      10      11      12      13      14      
15      16
                     17      18      19      20      21      22      
23      24
                     25      26      27      28      29      30      
31      32
                     33      34      35      36      37      38      
39      40
                     41      42      43      44      45      46      
47      48
                     49      50      51      52      53      54      
55      56
                     57      58      59      60      61      62      
63      64
                     65      66      67      68      69      70      
71      72
 done :: mapping elements to processors
 
  ERROR READING MESH DATA NEAR ELEMENT      1
  ABORTING IN ROUTINE RDMESH.
 
call exitt: dying ...
 
backtrace(): obtained 9 stack frames.
./nek5000 [0x551d88]
./nek5000 [0x653f02]
./nek5000 [0x44202e]
./nek5000 [0x43d215]
./nek5000 [0x403b32]
./nek5000 [0x403a8e]
./nek5000 [0x40389c]
/lib64/libc.so.6(__libc_start_main+0xf4) [0x3393c1d974]
./nek5000 [0x4037a9]
 
total elapsed time             :   0.00000E+00 sec
total solver time incl. I/O    :   0.00000E+00 sec
time/timestep                  :   0.00000E+00 sec
CPU seconds/timestep/DOF       :   0.00000E+00 sec

===================================================================================

Attached are all the files I've been using.

I also have a question concerning the descriptors line in the .box file.

===================================================================================

Cyl.rea
2                     Spatial dimension
1                       number of fields
#
#
#
Y                       cYlinder
3  -24  1               nelr, nel-theta, nelz
.5  .3                  x0, y0
ccbb                    descriptors: c-cyl, o-oct, b-box
.5  .55  .7  .8         r0 ... r_nelr
0  1  1                  theta0/2pi theta1/2pi ratio
v  ,W  ,E  ,E  ,      BC
 
===================================================================================

What does the ccbb line stands for ?
If I wanna mesh the cross section of a cylindrical pipe and then extrude 
it to a 3D mesh using n2to3, what descriptors should I use ?

Regards,

Jean-Christophe
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