[Nek5000-users] mesh problems (i think)

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

Hi Josh,

Thank you for the suggestion.
I was using the format indicated to be used for the reatore2 tool, as 
sugegsted on the webpages for curved elements and boundary conditions. 
Now I have changed it to be exactly the same of that produced by the 
n2to3 tool which I have used to create base3.rea (which is different) 
and made a step forward: now nek reads some more informations from the 
.rea file and gives me the following error when I try to run the case:

WARNING1 Element mesh mismatch at:
i,j,k,ie:    2    2    6    integer
Near X =  float float float, d: float float float

for 6 differente integers (2, 5, 8, 11).

The subroutine that produces the error is 'vrdsmsh' but I do not 
understand what the error means....

Best regards,
Jacopo



On 31/01/2014 20:10, nek5000-users at lists.mcs.anl.gov wrote:
> Hi Jacopo,
>
> I'm not able to look at your files at this moment, but I do have a quick
> suggestion.  Nek is normally pretty flexible when it comes to the .rea
> formatting except for boundary conditions and curve sides.  I would
> suggest carefully studying the format of the base3.rea file and make
> sure the formatting you are using to create pipe.rea is the same.
>
> - Josh
>
>
> On Fri, Jan 31, 2014 at 11:34 AM, <nek5000-users at lists.mcs.anl.gov
> <mailto:nek5000-users at lists.mcs.anl.gov>> wrote:
>
>     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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>
>
>
> --
> Josh Camp
>
> "All that is necessary for the triumph of evil is that good men do
> nothing" -- Edmund Burke
>
>
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