[MITgcm-support] Numerical diffusion

[Martin Losch]

Please wait until Monday,

M.
On 29 Sep 2006, at 13:32, chris hill wrote:

> Lars,
>
>  The centered second order scheme is not diffusive, but it is  
> dispersive!
>
>  There is a section in the online reference manual
>
> http://mitgcm.org/r2_web_testing/latest/online_documents/node85.html
>
> on how ( mostly horizontal ) viscosity is calculated. For vertical  
> mixing there is Large et al KPP code incorporated into the dynamics.
>
>  Martin Losch at AWI was recently thinking about whether to connect  
> to the GOTM suite of schemes. He may have some thoughts on this.  
> Martin also has a nice channel setup that he may be willing to  
> share? He is on this list.
>
> Chris
>
>
> Lars Inge Enstad wrote:
>> Hello
>> I am currently trying to implement an alternative vertical turbulence
>> model in MITgcm (GOTM (General Ocean Turbulence Model Burchard et
>> al.), has this been tried before?). My question is about the  
>> numerical
>> diffusion in the momentum advection scheme in MITgcm. How does this
>> depend on the spatial and temporal discretisation? What is the  
>> momentum
>> advection scheme with the lowest possible numerical diffusion in
>> MITgcm?  One of the test cases I want to verify the code with is  
>> channel
>> flow. In previous models I have used for channel flow, I have used a
>> constant pressure gradient to force the flow. Is there some easy way
>> to set up MITgcm this way?
>> Best Regards
>> Lars Inge Enstad
>
> _______________________________________________
> MITgcm-support mailing list
> MITgcm-support at mitgcm.org
> http://mitgcm.org/mailman/listinfo/mitgcm-support