[Nek5000-users] Mesh issue

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

Hi Paul,

Thanks for your quick answer.

The boundary conditions of the box are :
- W on the 4 sides of the box,
- v for the inlet,
- O for the outlet,
- W for the 6 faces of the plate (placed at the center of the box).

I didn't try to do the mesh by tilting the box to do the incline, but I 
don't really see how to make it.

I'm using a MatLab program found on the mailing list of Nek 
(https://lists.mcs.anl.gov/mailman/htdig/nek5000-users/2010-June/000645.html).
I noticed that for each blank in the boundary condition the figure in 
the 4th and the 5th column were 0 (which seems to correspond to a BC 
like W, v or O).
    17650  3 *0* *0.00000* 0.00000 0.00000 0.00000

Best regards,

Hugo


Le 21/05/2012 12:47, nek5000-users at lists.mcs.anl.gov a écrit :
>
> Hi Hugo,
>
> What are the boundary conditions on your box?
>
> Is there a reason not to simply tilt the box and realize
> the incline in this manner?
>
> Boundary conditions invariably have 3 characters in Nek.
> I don't know which converter you are using, but "   " as
> a bc would translate either to "E  " if it's an interior
> element boundary, or to something unknown otherwise.
>
> Best regards,
>
> Paul
>
> On Mon, 21 May 2012, nek5000-users at lists.mcs.anl.gov wrote:
>
>> Hi Nek's,
>>
>> I'm trying to mesh an inclined flat plate (dimension 1*1*1) in a 
>> large rectangular box ([-5,5]**3).
>> I'm using Gambit to mesh the flat plate and then I'm using a MatLab 
>> program found on this website to convert the mesh file (from Gambit 
>> .neu) in the correct format for Nek5000 (.dat).
>>
>> The MatLab conversion don't detect errors. But when I'm checking the 
>> .dat file I see some errors in the fluid boundary condition part :
>>
>> E  17650  2  17660 4.00000 0.00000 0.00000 0.00000
>>    17650  3  0         0.00000 0.00000 0.00000 0.00000
>> E  17650  4  17640 2.00000 0.00000 0.00000 0.00000
>>
>> There are some blanks in the first column of this file instead of a 
>> letter (E,v,O ...) .
>>
>> Did somebody already saw this error?
>> Is there another way to mesh an inclined flat plate?
>>
>> Best Regards,
>>
>> Hugo
>>
>>
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