Abnormal blow up

asked 2022-09-02 12:48:36 +0100

Hi! All, I met the following problem when I run croco for the configuration of the East China Sea. I have applied Sponge for the boundary conditions, however, it seems that it still blow up at the east boundary. I have attached the cppdef.h croco_inter.in file, and param.h files. Can anybody help? Thanks a lot in advance, Bei C:\fakepath\param.h C:\fakepath\croco_inter.in(/upfiles/16621156294938285.h) image description

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answered 2022-09-04 06:44:45 +0100

Isa_Su
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Hi! Andres, Thank you so much for your kind reply. I have used croco_inter.in as the input file, and please see in attachment. the Cu_max is 0.52 which did not exceed one. Look forward to hearing your thoughts, Best, Bei image description C:\fakepath\croco_inter.in C:\fakepath\param.h C:\fakepath\cppdefs.h

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Decrease the time step by half to see if it becomes stable. Cu_max less than 0.8 is a recommendation not a guarantee of stability. What is your grid size?

andres ( 2022-09-05 14:53:51 +0100 )edit

Thanks a lot for your help! Andres, I have decreased dt from only 900s to 800s, and now it is running ok. My grid size is 216*313*30

Isa_Su ( 2022-09-06 08:31:34 +0100 )edit

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answered 2022-09-02 17:14:22 +0100

andres