[MITgcm-support] simple question on internal wave simulation

[Matthew Mazloff]

Hi Lee

The "MON_SOLUTION: STOPPED DUE TO EXTREME VALUES OF SOLUTION" error  
just means your model is unstable...probably because of an  
inappropriate CFL number; you can look at the monitor output to see  
what your CFL number is.  CFL = U*dt/dx and must be < 1 (usually keep  
less than .5)

also note   dt < dx^2/viscah  and you have  dt = 60.0   and dx^2/ 
viscah = 7e-5  so that is one reason your model is blowing up...your  
dt is way too large or make viscah much bigger


good luck
matt

ps> I dont know about thread issue but i would try to get  a stable  
solution before i worried about it


On Feb 2, 2006, at 9:20 PM, hslee wrote:

> Hi MITgcm users
>
>
>
> I am a quite beginner of MITgcm and just set up for my system 
> (Linux’s cluster with ifort, mpi and mnc package => works fine) and  
> tested examples in verification.
>
> After this, I am trying to apply to my interested area for internal  
> wave simulation.
>
> Then, I have error a message shown below which I couldn’t figure it  
> out.
>
> Could anybody give me a clue what’s wrong with my simulation?
>
> I attached data file of this simulation
>
> ---------------------------------------------------------------------- 
> ---------------------------------------------------------------------- 
> -
>
> SOLUTION IS HEADING OUT OF BOUNDS: tMin, tMax= -2.172+280   1.363.294
>
> MON_SOLUTION: STOPPING CALCULATION
>
>  S/R EEDIE: Only     0 threads have completed,    1 are expected  
> for this configuration!
>
>
>
>
>
> Possibly you have different setenv PARALLEL and nThreads?
>
> MON_SOLUTION: STOPPED DUE TO EXTREME VALUES OF SOLUTION
>
>
>
> Thanks in advance.
>
>
>
> Lee HanSoo
>
>
>
> Ph.D student,
>
> RCFCD, DPRI, Kyoto University,
>
> Kyoto, Japan, 611-0011
>
> Email: hslee at rcde.dpri.kyoto-u.ac.jp
>
> TEL : 81-(0)774-38-4309
>
> <data>
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> MITgcm-support at mitgcm.org
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