[CIG-SEISMO] CIG-SEISMO Digest, Vol 69, Issue 6

[Dylan Mikesell]

Dear Yingzi,

Thank you for the comments. If I find/write a better solution, I will post
it to the user group.
Cheers,

Dylan


On Wed, Oct 30, 2013 at 11:28 AM, Yingzi Ying <yingzi.ying at me.com> wrote:

> Hi Dylan,
>
> I am in similar situation to do 2d simulations with some velocity
> structures, but with fluid-solid coupling...
>
> One solution to is to supply with "DATA/model_velocity.dat_**input" which
> defines value in each GLL points. I tried this method but no success. PS. I
> have reported my problem here but no response...
>
> Another way is to give value of each spectral element, that you can define
> "nbmodels" and "nbregions" in "DATA/Par_file" with your own.
>
> If you have any better solution, please also let me know.
>
> Good luck,
> Yingzi
> On 10/30/2013 03:14 PM, cig-seismo-request@**geodynamics.org<cig-seismo-request at geodynamics.org>wrote:
>
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>> Today's Topics:
>>
>>     1. SPECFEM2D - random velocity models and meshing (Dylan Mikesell)
>>
>>
>> ------------------------------**------------------------------**
>> ----------
>>
>> Message: 1
>> Date: Wed, 30 Oct 2013 10:42:51 -0400
>> From: Dylan Mikesell <mikesell at MIT.EDU>
>> To: cig-seismo at geodynamics.org
>> Subject: [CIG-SEISMO] SPECFEM2D - random velocity models and meshing
>> Message-ID:
>>         <CADgqVRb+**3JFKBvTF7c5VChkhPsv7HKiNOLk-**q78Gd=
>> ULucOM8w at mail.gmail.com>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> Dear SPECFEM2D group,
>>
>> I have a question regarding meshing and the EXAMPLES/INDUSTRIAL_FORMAT
>> example.
>>
>> I would like to simulate p-wave propagation with SPECFEM2D in the attached
>> velocity model.
>> (the left plot shows the background velocity field, the right plot shows
>> the field after draping a random perturbation field over the background. I
>> am using the right plot for simulation).
>>
>> I was trying to use/understand the INDUSTRIAL_FORMAT example so that I
>> could just drop this velocity model into place and go. I have a SeisUnix
>> velocity model. As far as I could tell, that example created a mesh with
>> xmeshfem2D and then mapped some given SEP velocity model onto that mesh
>> using a nearest neighbor routine. I can modify things to get an SU model
>> to
>> work, but I am not sure that is the way I need to go.
>>
>> Since I do not know too much about the meshing, I thought I would ask the
>> pros. Will the internal xmeshfem2D work for this velocity model or should
>> I
>> use something else? I see Gmsh in the 2D user manual and Cubit in the 3D
>> Cartesian user manual.
>>
>> The boundary conditions are not a big deal at the moment. I see there is a
>> little extra work to get PMLs using the external meshers.
>>
>> Thank you for any thoughts.
>>
>> Dylan
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>> End of CIG-SEISMO Digest, Vol 69, Issue 6
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