[Nek5000-users] n2to3 mesh size error

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

Does exo2nek support 3D conversion? Also, someone should consider updating
the README for the exo2nek tools. Its not quite clear for someone who is
starting out with nek5000, what exactly sideset ids are and how fluidic bcs
are actually assigned. I will however give it a go.

Thanks for your help everyone.

On Tue, Nov 14, 2017 at 9:39 AM <nek5000-users at lists.mcs.anl.gov> wrote:

> can you generate the same mesh in a exodus format? If you can, use the
> exo2nek script to convert the mesh in a re2 file.
>
> Marco
>
> On Nov 14, 2017, at 9:36 AM, nek5000-users at lists.mcs.anl.gov wrote:
>
> Note, this converter is not part of Nek5000 and not support by us. Yes
> this converter does not output the correct BC.
>
> On 14 Nov 2017, at 08:13, "nek5000-users at lists.mcs.anl.gov" <
> nek5000-users at lists.mcs.anl.gov> wrote:
>
> So your mesh has more than 1000 elements. I think that the way the python
> script is written the boundary conditions in a rea file is not correct. I
> had this issue in the past.
>
> On Nov 14, 2017, at 9:02 AM, nek5000-users at lists.mcs.anl.gov wrote:
>
> Its a 25X25 square grid in 2D. Im trying to extrude this with 10 elements
> in the z direction.
>
> On Tue, Nov 14, 2017 at 8:13 AM <nek5000-users at lists.mcs.anl.gov> wrote:
>
>> What is the number of elements in your mesh?
>>
>> On Nov 13, 2017, at 11:40 PM, nek5000-users at lists.mcs.anl.gov wrote:
>>
>> Gmsh to .rea using CPraveen's python mesh converter.
>>
>> On Mon, Nov 13, 2017, 10:52 PM <nek5000-users at lists.mcs.anl.gov> wrote:
>>
>>> Looks like the boundary conditions in your .rea file are somehow messed
>>> up. How do you generate you .rea?
>>>
>>> -----Original message-----
>>> > From:nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
>>> > Sent: Tuesday 14th November 2017 4:47
>>> > To: nek5000-users at lists.mcs.anl.gov
>>> > Subject: [Nek5000-users] n2to3 mesh size error
>>> >
>>> > Hi all,
>>> >
>>> > I keep running into an error whenever I want to use n2to3 to extrude
>>> my mesh from 2 dimensions to 3. My workflow is as follows:
>>> >
>>> > gmsh .geo file -> gmsh .msh file -> .rea file -> n2to3 > .rea (3D)
>>> file.
>>> >
>>> > Now if the original 2D .rea file obtained from gmsh contains less than
>>> 1000 elements, n2to3 fails with the error
>>> >
>>> > At line 651 of file n2to3.f (unit = 10, file = msh_test.rea)
>>> > Fortran runtime error: Bad value during integer read
>>> >
>>> > However, should this not be the case (mesh size > 1000) its all smooth
>>> sailing. The trouble is with a mesh of that size my processor and memory
>>> requirements quickly blow up.
>>> >
>>> > Incidentally, genmap fails under almost exactly the same conditions.
>>> >
>>> > Is there a lower limit to mesh size issue for nek5000 that Im missing
>>> here?
>>> >
>>> > Sincerely,
>>> > --
>>> > Amitvikram Dutta
>>> > Graduate Research Assistant
>>> > Fluid Mechanics Research Lab
>>> > University of Waterloo
>>> > _______________________________________________
>>> > Nek5000-users mailing list
>>> > Nek5000-users at lists.mcs.anl.gov
>>> > https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users
>>> _______________________________________________
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>>> Nek5000-users at lists.mcs.anl.gov
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>>>
>> --
>>
>> *Amitvikram Dutta*
>>
>> Graduate Research Assistant
>>
>> Fluid Mechanics Research Lab
>>
>> University of Waterloo
>> _______________________________________________
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>> Nek5000-users at lists.mcs.anl.gov
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>>
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> --
>
> *Amitvikram Dutta*
>
> Graduate Research Assistant
>
> Fluid Mechanics Research Lab
>
> University of Waterloo
> _______________________________________________
> Nek5000-users mailing list
> Nek5000-users at lists.mcs.anl.gov
> https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users
>
>
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>
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-- 

*Amitvikram Dutta*

Graduate Research Assistant

Fluid Mechanics Research Lab

University of Waterloo
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