[MITgcm-support] Thanks Samar...

[Riema Rachmayani]

hi, samar...

finally you answered my message...
thanks a lot for your explanation about cveltimescale and radiation BC,
i'll try your advice to prescribe eta and U at one end and let the radiation BC at the other end.

wish me luck,  

regards,
rima


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Subject: MITgcm-support Digest, Vol 44, Issue 13


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Today's Topics:

   1. Re: segmentation fault (Samar Khatiwala)


----------------------------------------------------------------------

Message: 1
Date: Sat, 17 Feb 2007 23:03:24 -0500
From: Samar Khatiwala <spk at ldeo.columbia.edu>
Subject: Re: [MITgcm-support] segmentation fault
To: mitgcm-support at mitgcm.org
Message-ID: <3DA95183-B125-4E85-8359-8C5A9E461D55 at ldeo.columbia.edu>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed

Hi Riema

Sorry I haven't been able to respond. I've been buried in work and  
its been hard to find time to think about your
problem.

As I said, there is no magic formula for this. The time scale is  
there to filter out the diagnosed phase speeds
that can be quite noisy. One thing you can do is monitor the  
diagnosed phase speed at a few grid points as a
function of time and use that to tune the cvelTimeScale.

I also don't have much advice on a purely barotropic simulation. I  
have never forced the model through a
prescribed eta like you do. So I can't say why you get a phase error  
in the velocity. What I find strange
about your setup is that you prescribe eta at both ends but then  
apply a radiation BC on Uvel. It doesn't
sound right at all. I think you want to prescribe eta and U at one  
end and let the radiation BC do its thing
at the other end.

Samar

On Feb 15, 2007, at 9:16 PM, Riema Rachmayani wrote:

> dear all,
>
> thank you martin about future time, Samar Khatiwala said that  
> cvelTimeScale has no magic formula, in MITgcm cvelTimeScale is  
> averaging period,but i still dont get it...default in MITgcm  
> is=2000.0, well i'll wait for Samar Khatiwala reply about it, thank  
> you martin
>
> i'm modifying obcs_calc.F and obcs_apply_eta.F, but there is  
> message error : SEGMENTATION FAULT
>
> what is that?? what should i do??
>
> thank you,
> rima
>
>
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