[CIG-SEISMO] Element size specfem3d cartesian

Dimitri Komatitsch komatitsch at lma.cnrs-mrs.fr
Wed Jul 1 04:26:33 PDT 2015

Hi Moritz,

The rule we use is one element per shortest wavelength. Thus if you have 
a dominant frequency f0, often the maximum frequency is about 2.5 f0, 
then use one element per 2.5 f0.

Best wishes,

On 07/01/2015 12:55 PM, Moritz Wehler wrote:
> Hey there,
> I am currently setting up a 3d model with geocubit (using specfem3d
> cartesian). Concerning the element size I was told - as a rule of thumb
> - to use the following formula:
>      elem_size = 0.6 times wavelength.
> Is the factor 0.6 correct and if so, where does it come from
> (literature?, empirically derived?...)?
> If not, what would you suggest to use?
> Thanks in advance and best regards,
> Moritz
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Dimitri Komatitsch
CNRS Research Director (DR CNRS), Laboratory of Mechanics and Acoustics,
UPR 7051, Marseille, France    http://komatitsch.free.fr

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