[MITgcm-support] The criteria of cg3dMaxIters

[Saeid Esmaeilpour]

However I selected nonHydrostatic=.TRUE because I also would like to see
Eddies in my domain.

On Tue, Aug 15, 2017 at 12:29 PM, Saeid Esmaeilpour <
saeidesmaeilpour at gmail.com> wrote:

> Jody,
> my model is about The simulation of currents Circulation from surface to
> depth in indian Ocean,  and I selected  nonHydrostatic=.TRUE., cause I
> think the model resolve the Nonlinear terms with nonHydrastatic=True (am I
> wrong ?).  If I select nonHydrastatic=True, in this case how much should I
> set for cg3MaxIters? and If select nonHydrastatic=False, how much for that?
> basically for the simulation of currents Circulation and at 2-degree I have
> to take non Hydraustatic=false?
>
> Thanks again,
>     Saeid
>
> On Tue, Aug 15, 2017 at 11:59 AM, Jody Klymak <jklymak at uvic.ca> wrote:
>
>> Hi Saied,
>>
>> cg3dMaxIters is only used if nonHydrostatic=.True.. You aren’t resolving
>> any non-hydrostatic physics at 2-degree resolution, so I would suggest
>> setting nonHydrostatic=.False. Your model runs will be *much* faster.
>>
>> Cheers, Jody
>>
>> On 15 Aug 2017, at 8:43, Saeid Esmaeilpour wrote:
>>
>> Hi Dear users,
>> could someone please explain to me what are the following PARM02?
>> when I increase cg3dMaxIters from 50 to 400 (e.g,. cg3dMaxIters=400) the
>> run speed becomes very slowly. how can I select this value? what's the
>> criteria for selecting this number? My domain is 510*210 with 20layer and
>> also my resolution is 2 degree (3704m).
>>
>> # Elliptic solver parameters
>> &PARM02
>> cg2dMaxIters=1000,
>> cg2dTargetResidual=1.E-13,
>> cg3dMaxIters=400,
>> cg3dTargetResidual=1.E-13,
>>
>> Thanks for any help,
>> Saeid
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