[CIG-SEISMO] SPECFEM2D plane wave simulations in heterogeneous media

[Dimitri Komatitsch]

Hi Nicholas,

Thanks!

How do you define a plane wave in a heterogeneous medium? in a 
heterogeneous medium you should (and will) get things like 
http://komatitsch.free.fr/shear_wave_in_concrete_SPECFEM_Komatitsch.mpeg

Is the same run fully OK on a single processor?

thanks
Dimitri


On 29/03/2016 17:34, Mancinelli, Nicholas wrote:
> Hi SPECFEM team,
>
> I am using SPECFEM2D to simulate an SV plane wave incident upon the free
> surface, where the Earth model is heterogeneous and is read in from a file.
>
> I have noticed, however, that instabilities quickly develop in the
> wavefield when I use more than a single processor, and that the apparent
> number of instabilities increases with the number of processors.  I have
> been able to reproduce this issue on two independent systems, and the
> issue does not seem to be particularly sensitive to the specific 2D
> velocity model that I choose.
>
> Attached are images of the wavefield and an example Par_file.  Am I
> doing something wrong as I set up this model?
>
> Best,
> Nick
>
> --
> Nicholas J Mancinelli
> Postdoctoral Research Associate
> Department of Earth, Environmental,
> and Planetary Sciences
> Brown University
>
>
> _______________________________________________
> CIG-SEISMO mailing list
> CIG-SEISMO at geodynamics.org
> http://lists.geodynamics.org/cgi-bin/mailman/listinfo/cig-seismo
>

-- 
Dimitri Komatitsch
CNRS Research Director (DR CNRS), Laboratory of Mechanics and Acoustics,
UPR 7051, Marseille, France    http://komatitsch.free.fr