[MITgcm-support] A constant flow

[fancer fancer]

Thank you very much, Jody, for help. And sorry for delayed response
Your advices is very helpful for our work.
Can I post my questions about our estuary experiment in this thread?

Yours sincerely,
Sergey Semin


On Wed, Jul 13, 2011 at 3:08 AM, Klymak Jody <jklymak at uvic.ca> wrote:

> Serge,
>
>
>
> On 2011-07-12, at 11:16 AM, fancer fancer wrote:
>
> Dear Jean-Michel,
> As I know The setting momStepping in false value turns off a calculation of
> evolution of flux. But we need such calculations in our experiment. Are
> there some other way to set constant background flow such as the river?
>
> Dear Joseph,
> Is it real to set current on eastern boundary as the river and to set flow
> on western boundary as a barotropic tidal at the same time
>
>
> Sure you can do this.  However, I'd make sure the western boundary was
> tide+net flow so the river water has somewhere to go unless you don't mind
> the domain filling up over time.  You'll probably also want either a) a
> sponge, and/or b) a large reservoir to let your estuarine circulation set up
> in the interior of your model domain. You will have estuarine velocities on
> top of the tide, and you won't be able to predict those a-priori, so you
> need to sponge them away before they hit the western boundary.
>
> Cheers,   Jody
>
>
> A little bit about experiment:
> It will be a numerical experiment on pycnocline evolution in estuary under
> irregular bottom.
> In particular in first part of experiment we need to set an irregular
> bottom, a constant background flow as the river flow, a periodic flow as a
> barotropic tidal on a western boundary, and to set a distribution of
> density.
>
> I know how to set almost all these parameters. But I am not sure about
> background flow.
> Is my suggestion about redefinition external_forcing.F correctly? And can I
> set the background flow just by adding a constant flow to gU array, for
> example, in EXTERNAL_FORCING_U subroutine for all kLev?
>
> Yours sincerely,
> Sergey Semin
>
> On Fri, Jul 8, 2011 at 2:26 AM, Jean-Michel Campin <jmc at ocean.mit.edu>wrote:
>
>> Hi Sergey,
>>
>> I would propose to try the following:
>> - set an initial flow field that corresponds to what you want.
>> - turn off all the momentum (just specify:
>>   momStepping=.FALSE.,
>>  in parameter file "data", 1rst namelist)
>> (this is how we do the advection tests with constant flow field,
>>  see verification/advect_cs,  advect_xy & advect_xz )
>>
>> Cheers,
>> Jean-Michel
>>
>> On Fri, Jul 08, 2011 at 01:12:21AM +0400, fancer fancer wrote:
>> > Dear MITgcm users.
>> >
>> > I am trying to create the ocean numerical experiment with constant
>> current,
>> > in particular, the river with constant flow. As I understood I can add
>> > permanent flux by redefining external_forsing.F file with needed flow
>> speed.
>> > Is it right?
>> >
>> > Are there some other easier approaches to implement this? Do exf-package
>> has
>> > some possibility to set constant current? I didn't find information
>> about
>> > this opportunity in manual.
>> >
>> > Thank You in advance.
>> >
>> > Yours sincerely,
>> > Sergey Semin
>>
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>>
>>
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>
> Jody Klymak, Assistant Professor, SEOS and Physics & Astronomy, U. of
> Victoria
> jklymak at uvic.ca
>
>
>
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>
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