Blow up after running for 2-3 days

General scientific issues regarding ROMS

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jitraporn13
Posts: 12
Joined: Mon May 02, 2016 12:54 pm
Location: Kasetsart University

Blow up after running for 2-3 days

#1 Unread post by jitraporn13 »

GOT60.jpg
Hi All

I'm running ROMS for Gulf of Thailand (with dy=dx=5000m). It blow up after running for 2-3days.
So I changed dt from 60 to 30. It can run longer but it still blow up.

When I check my last file before blow up (as attached). It shows abnormal u,v around the western boundary
of the domain.

Please give me some advise.
GOTV.jpg
GOTU.jpg
Thank you so much
Jitraporn

riza25
Posts: 2
Joined: Mon Dec 14, 2015 5:27 pm
Location: unmul

Re: Blow up after running for 2-3 days

#2 Unread post by riza25 »

I think the problem is your masking.. can you write your boundary condition

jitraporn13
Posts: 12
Joined: Mon May 02, 2016 12:54 pm
Location: Kasetsart University

Re: Blow up after running for 2-3 days

#3 Unread post by jitraporn13 »

Now, i define as 'close boundary' for all.

riza25
Posts: 2
Joined: Mon Dec 14, 2015 5:27 pm
Location: unmul

Re: Blow up after running for 2-3 days

#4 Unread post by riza25 »

Try to using open boundary, did you smooth yout bathymetry?

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kate
Posts: 4088
Joined: Wed Jul 02, 2003 5:29 pm
Location: CFOS/UAF, USA

Re: Blow up after running for 2-3 days

#5 Unread post by kate »

You have shown us surface stress, not velocity. What surface forcing fields are you using?

I think you effectively have two separate domains due to the land masking - right?

fdaryabor
Posts: 78
Joined: Wed Jan 02, 2008 3:15 pm
Location: University of Copenhagen

Re: Blow up after running for 2-3 days

#6 Unread post by fdaryabor »

Hi
As I look on the domain not defined properly 'land/sea (mask)'.
Cheers

salik
Posts: 16
Joined: Tue Jan 14, 2014 3:02 pm
Location: Geological Survey of Denmark and Greenland

Re: Blow up after running for 2-3 days

#7 Unread post by salik »

Those surface stresses seem way too high to me. What forcing are you using?

jitraporn13
Posts: 12
Joined: Mon May 02, 2016 12:54 pm
Location: Kasetsart University

Re: Blow up after running for 2-3 days

#8 Unread post by jitraporn13 »

Dear all,

Thank you so much for your reply. I figure out my problem is
about the land-masking.

One more question on 'Zeta'. I am kind of confuse for the zeta.
I got all negative. I dont know why? Because I'm trying to get
the sea surface elevation.

Thanks again.
Jitraporn

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