[Nek5000-users] Mesh issue

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

Hi Hugo,

Can you tell me again the plate dimension ? (Is it really 1x1x1 ?)

What is the angle of incline?

Paul


On Mon, 21 May 2012, nek5000-users at lists.mcs.anl.gov wrote:

> 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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