[MITgcm-support] Open Boundary Conditions in MITgcm

[fancer fancer]

Hi Martin. Sorry for belated answer and thanks for replies.

There are small changes then I use Orlanski conditions, reflected waves have
smaller amplitudes, but they are still reflected.
I use default values CMAX and cVelTimeScale. I have not found some
information about Orlanski radiation boundary condition in free access.
Could You please tell me some formula or rule for these parameters selection
(for waves reflection minimizing)? Not trivial task to get it from code.

P.S. My project in attachment, if it needed.

-Serge

On Thu, Feb 24, 2011 at 10:31 AM, Martin Losch <Martin.Losch at awi.de> wrote:

> Serge,
> claim
> you might have noticed that the documentation of the obcs-pkg is
> incomplete:
> <http://mitgcm.org/public/r2_manual/latest/online_documents/node236.html>
> but can find all the information about the OB_Ieast etc. indices and other
> run-time parameters. For more you'll have to consult the code in pkg/obcs
> and the corresponding experiments in verification I am afraid.
>
> There is a orlanski-radiation conditions. To turn it on you need to
> re-compile with
> #define ALLOW_ORLANSKI
> in OBCS_OPTIONS.h and useOrlanskiNorth/South/East/West=.true. for the
> boundary of intererst. There are some experiments that use this option (e.g.
> tutorial_plume_on_slope, dome). If you are not happy with that, you'll need
> to implement something on your own.
>
> I hope this helps,
> Martin
>
> On Feb 20, 2011, at 5:12 PM, fancer fancer wrote:
>
> > Hello, MIT gcm support.
> > I am novic at modeling with MIT gcm, thus I have several questions about
> this model and about obcs package, especially.
> >       • My first application describe itnternal waves propagation,
> generated by temperature and salinity stratification, in 2D area. This is
> the trivial task, because MIT gcm has internal waves verification example.
> It is necessary, what waves go through boundaries, but not reflect of that
> boundaries. How made it with obcs package or with other way? I made many
> experiments, but whitout positive results.
> >       • Is there more detailed information about open boundies setting in
> MIT gcm, it is desirable with picture, where OB_Ieast, OB_Iwest, OB_Jsouth,
> OB_Jnorth represented in a modeling area?
> > In advance, thanks for help.
> > Yours sincerely, Serge Semin.
> > P.S, Sorry for my emglish, I'm still learning.
> > _______________________________________________
> > MITgcm-support mailing list
> > MITgcm-support at mitgcm.org
> > http://mitgcm.org/mailman/listinfo/mitgcm-support
>
>
> _______________________________________________
> MITgcm-support mailing list
> MITgcm-support at mitgcm.org
> http://mitgcm.org/mailman/listinfo/mitgcm-support
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mitgcm.org/pipermail/mitgcm-support/attachments/20110228/2b717466/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: exp7_2D_OBCS.tar.gz
Type: application/x-gzip
Size: 131102 bytes
Desc: not available
URL: <http://mitgcm.org/pipermail/mitgcm-support/attachments/20110228/2b717466/attachment-0001.gz>