[CIG-SEISMO] creating mesh file for a pipe model

[Dimitri Komatitsch]

Dear Volan Hu,

I assume the pipe itself will be a free surface, thus I think you only 
need xmin and xmax (if you want to put absorbing conditions there), and 
nothing else.
(in finite-element methods such as the SEM, if you impose nothing, you 
automatically get a free surface).

We have never tried but I think it should work. Please let me know, I am 
interested in the answer (we have begun to use SPECFEM3D for industrial 
problems that do not involve seismic waves / earthquakes).

Thank you,
Dimitri.

On 04/24/2013 05:19 PM, 胡久鹏 wrote:
>
>
> Dear Help Team,
>
> I would like to compute the 3-D wave propagation in a water-filled pipe, with the source in the middle of the pipe.
>
> I wonder how to define the boundary condition for this purpose for usingcubit2specfem3d.py to export available mesh files.
>
> For general brick model,  six blocks are needed:face_topo,xmin, xmax, ymin, ymax and bottom. But there are only three faces in the pipe model:xmin,xmax and outside-cylinder surface.
>
> Thank you very much for your help/comments.
>
> Kind regards,
>
> Volan Hu
>
>
>
> <#>
>
>
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-- 
Dimitri Komatitsch
CNRS Research Director (DR CNRS), Laboratory of Mechanics and Acoustics,
UPR 7051, Marseille, France    http://komatitsch.free.fr