[Nek5000-users] Connectivety

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

Hi Antonios,

Aleks is correct.  The "E-E" connectivity in the .rea BC info
is ignored by nek.

Connectivity is determined strictly from the mesh topology
inferred from the data in the .map file.

The same is not true, however for periodic bcs -- this information
must come from the "P-P" pairing in the .rea bc info.

Does this make sense?

Cheers,

Paul


On Thu, 9 Dec 2010, nek5000-users at lists.mcs.anl.gov wrote:

> Hi Antonios,
>
> I could be wrong but I think that the only connectivity information that 
> Nek5000 need comes from global vertexi element numbering genereated by .map 
> file which is in turn produced by running genmap on .rea file
>
> Best,
> Aleks
>
>
> On Thu, 9 Dec 2010, nek5000-users at lists.mcs.anl.gov wrote:
>
>> Hello Paul,
>> I have a question about the connectivity of the elements.
>> In the old rea file format (which we convert to the new binary with
>> reatore2) we have listed the Element geometrical date and after that the
>> Boundary conditions and connectivity data.
>> My question is whether the connectivity of the elements stated there is
>> actually used or it is somehow re-computed while the code runs based on
>> the node coordinates. I am talking specifically about the connectivity
>> between the elements, not the boundary conditions with the "outside world".
>> Best regards,
>> Antonios
>> 
>> --
>> 
>> ---------------------------------------------------------------------------------------------
>> Antonios Monokrousos
>> Department of Mechanics                 email:    antonios at mech.kth.se
>> Royal Institute of Technology (KTH)     phone:    +46 8 790 68 76
>> Osquars Backe 18                        telefax:  +46 8 796 98 50
>> SE-100 44 Stockholm, SWEDEN
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