[MITgcm-support] Orlanski boundary conditions

[Sonya Legg]

Hi martin,

Thanks, I'll try the dome test case. But the internal waves one 
definitely breaks when we turn on the orlanski bcs, although with c62 it 
works fine.

Sonya

On 6/10/2013 3:33 AM, Martin Losch wrote:
> Hi Sonya,
>
> I never really had a look at the Orlanski BC, but I don't think that they have changed over time. Here is what I got from grepping the verification directory:
> csysm15::verification> grep -i useOrlanski */input*/data.obcs | grep -v "#"
> dome/input/data.obcs: useOrlanskiWest=.TRUE.,
> dome/input/data.obcs: useOrlanskiNorth=.FALSE.,
> obcs_ctrl/input_ad/data.obcs: useOrlanskiNorth=.FALSE.,
> tutorial_plume_on_slope/input/data.obcs: useOrlanskiEast=.TRUE.,
>
> So only the forward experiments "dome" (you should be familiar with (o:) and "tutorial_plume_on_slope" both use the Orlanski BC.
>
> Martin
>
> On May 28, 2013, at 5:49 PM, Sonya Legg <sonya.legg at noaa.gov> wrote:
>
>> Dear mitgcm folks,
>>
>> I have been using MITgcm_c62q for a long time, running process study simulations of internal waves, forcing the wave at the west boundary with specified boundary conditions, and allowing the wave to propagate out of the domain at the east boundary with orlanski boundary conditions.
>>
>> I have a new student starting research with me, and he has been attempting to set the code using the latest version of the code, downloaded last week through CVS. He successfully ran the internal wave test case, but when he added orlanski boundary conditions at the eastern boundary (along with appropriate changes to the data file, i.e. no nonlinear free surface etc), the code blows up. With version c62q he can successfully convert the internal wave test case to run with orlanski boundary conditions at the eastern boundary.
>>
>> So my question is: have the orlanski boundary conditions been verified for newer versions of the code? Can you point me to an orlanski boundary condition test case?
>>
>> Thanks
>>
>> Sonya
>>
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