[Nek5000-users] Generating a 2D circular mesh

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

Hello all.   Just to add bit, I had the same problem as David with genbox.  

--Mike


On Sep 10, 2011, at 9:45 AM, <nek5000-users at lists.mcs.anl.gov> <nek5000-users at lists.mcs.anl.gov> wrote:

> 
> 
> Hi David,
> 
> It's been awhile since I tested this option in genbox.
> 
> I would suggest the alternative route of simply
> wrapping the box geometry in usrdat2, as is done
> for the 2D Taylor Couette example in
> 
>    nek5_svn/examples/Taylor
> 
> Please let me know if that approach works for you.
> 
> Paul
> 
> 
> 
> On Sat, 10 Sep 2011, nek5000-users at lists.mcs.anl.gov wrote:
> 
>> Hi Neks,
>> 
>> I'm having a little trouble with my first foray into circular geometries. I
>> tried to construct a 2D annular mesh using genbox with the following .box
>> file:
>> 
>> -----------------------------------------------------------------------
>> an.rea
>> 2                     spatial dimension
>> 2                     number of fields
>> Y
> 
> vi
>> -4  -12          nelr,nel_theta
>> 0 0              x0 y0
>> ccbb
>> 1 2 1
>> 0 1 1
>> SYM,SYM,         V bc's  ! NB:  3 characters each !
>> f  ,f  ,         T bc's  !      You must have 2 spaces!!
>> -----------------------------------------------------------------------
>> 
>> genbox seems to work properly, with the exception of the fact that nothing
>> after the boundary data gets copied over from the old .rea file.  Nonethess,
>> I copy that chunk over manually and run nek5000, which exits with the
>> following error:
>> 
>> WARNINGa: Detected non-right-handed element.
>> Number       1  C1-4:  0.6667E+00  0.8333E+00 -0.2083E+00 -0.4167E-01
>> 
>> 
>> Any guidance would be much appreciated.
>> 
>> Best,
>> 
>> David
>> 
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