Problem to simulating ROMS model with high resolution segrid

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prakash22
Posts: 24
Joined: Thu Jan 08, 2015 11:16 pm
Location: iit delhi

Problem to simulating ROMS model with high resolution segrid

#1 Unread post by prakash22 »

Dear Roms User

When I ran roms model with coarse resolution segrid mesh than everything is going ok

But when I increase the resolution (fine resolution) there is problem in zeta value its going more than 15 meter .

So could you tell me why it is happening


Thanks & regard
-Ravi

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

Re: Problem to simulating ROMS model with high resolution se

#2 Unread post by kate »

We can't know what your problem is with just that much information. Can you show us your grid? A picture of the blow-up before it gets completely bad? If you want reasons to blame SeaGrid, your grid is probably not completely orthogonal. The algorithm used in SeaGrid is designed to be iterated to reduce the orthogonality errors, but SeaGrid does not do that. If you didn't get the mex stuff to compile, it will run without even calling "rect" once. Using ROMS on a non-orthogonal grid won't necessarily cause it to blow up, though, or you'd be seeing a lot more such complaints.

prakash22
Posts: 24
Joined: Thu Jan 08, 2015 11:16 pm
Location: iit delhi

Re: Problem to simulating ROMS model with high resolution se

#3 Unread post by prakash22 »

u.gif
Hikate ,

I am attaching my grid and picture of zeta u-velocity and v-velocity at last time where model was blown up


thanks&regard
-Ravi
Attachments
v.gif
grid.gif

prakash22
Posts: 24
Joined: Thu Jan 08, 2015 11:16 pm
Location: iit delhi

Re: Problem to simulating ROMS model with high resolution se

#4 Unread post by prakash22 »

sorry I forgot to attached zeta value

now I am attaching zeta
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zeta.gif

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

Re: Problem to simulating ROMS model with high resolution se

#5 Unread post by kate »

You did change your timestep with going to a finer grid, didn't you? What's with that line along 20N separating blue from green in the zeta plot?

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