[Nek5000-users] mesh problems (i think)

nek5000-users at lists.mcs.anl.gov nek5000-users at lists.mcs.anl.gov
Fri Jan 31 11:34:56 CST 2014


Dear Neks,
I am trying to set up a case from scratch.
The goal is to create a complex 3d cylindrical mesh, to start I am
trying to build a pipe.

1st attempt:
I created a simple 2d 'base.rea' file (by hand) and extruded it with
n2to3 to create 'base3.rea'. This case works in 3d, the outer edges are
curved and the boundary conditions are correct.

2nd attempt:
I wrote a piece of code to create a 3d 'pipe.rea'. I tried to reproduce
the case that I had done by hand but this time without success.
nek runs the case and produces the usual output without giving any
errors but...
Problems:
  - the outer edges are not curved
  - the boundary conditions are not imposed correctly

In both cases I used the same .usr and SIZE files.

It seemed to me that I had a problem with face numbering, so I tried
changing the number of the curved faces in the pipe.rea file. I tried
with all 6 numbers but still no curved faces.

I have attached both the 'base3.rea' (which works) and the 'pipe.rea'
(which doesn't). I also attached a picture of the output generated when
running the 'pipe.rea' case and the SIZE and .usr files.
All the attached files can be downloaded from my dropbox folder at this
link:
https://dl.dropboxusercontent.com/u/18689429/attachment.zip


Can someone help me understand why 'pipe.rea' does not work?

Best regards,
Jacopo
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