[MITgcm-support] Solution blows up

[Shevchenko, Igor]

Hi Jody,

Thank you very much for your answer.
Attached is STDOUT.0000 . Does the CFL look suspicious?

Best regards,
Igor

________________________________________
From: MITgcm-support <mitgcm-support-bounces at mitgcm.org> on behalf of Jody Klymak <jklymak at uvic.ca>
Sent: 04 March 2020 16:44
To: mitgcm-support at mitgcm.org
Subject: Re: [MITgcm-support] Solution blows up


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Hi Igor,

1. you could have density overturns in the interpolated field, and those will manifest as high vertical velocities that violate the CFL criterion.

2. you likely have some fast adjustment that is violating CFL and may need to use a smaller timestep for a little while until the model adjusts.

The fact you tried “different time steps” says that maybe the problem is more complicated, but it would be good to look at STDOUT.0000 and see what the cfl criterion is saying.

Cheers,   Jody

--
Jody Klymak
http://web.uvic.ca/~jklymak/





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