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ROMS/TOMS

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 Post subject: visc values
PostPosted: Tue May 19, 2015 6:58 am 
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Joined: Mon Mar 11, 2013 6:13 pm
Posts: 6
Location: CMIMA
Hello,

I wonder why in the Benchmarks examples, the value of VISC2 is 5000, and in the rest of the test cases this value use to be 5.0 reaching a maximum of 100.0 in the Channel test. Why is so high?
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 Post subject: Re: visc values
PostPosted: Tue May 19, 2015 4:42 pm 
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Joined: Wed Jul 02, 2003 5:29 pm
Posts: 3633
Location: IMS/UAF, USA
This thread should be moved to somewhere more appropriate... :arrow:

In general, you'd want the viscosity value to depend on the grid spacing as described here. The benchmark case is a toy problem in which one large value was used for a range of horizontal resolutions - so the damping is too high, but who cares.


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 Post subject: Re: visc values
PostPosted: Thu May 21, 2015 11:42 am 
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Joined: Mon Mar 11, 2013 6:13 pm
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Location: CMIMA
Thanks!


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