[MITgcm-support] The criteria of cg3dMaxIters

[Jody Klymak]

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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