[MITgcm-support] zero free surface

[Nataliya Stashchuk]

Hi Matt,

Thank you for your answer.
If I use my own 2D model to simulate internal waves, I use rigid lid which is motionless.
I found that with MITgcm these free surface oscillations (Eta) simulate wrong solutions in 2D case for internal wave generation.

Nataliya

From: mitgcm-support-bounces at mitgcm.org [mailto:mitgcm-support-bounces at mitgcm.org] On Behalf Of Matthew Mazloff
Sent: 20 April 2009 18:42
To: mitgcm-support at mitgcm.org
Subject: Re: [MITgcm-support] zero free surface

Hi Nataliya,

I believe it is impossible to fix Eta to zero....a surface pressure is needed to make the fluid non-divergent....perhaps you could code this if you used non-hydrostatic model...not sure what would happen

Anyway, you can use rigid-lid to set W = 0 at the surface....but pressure will be exerted on the fluid by the lid...so in essence Eta will not be 0.

if you want to use rigid-lid set
 rigidLid=.TRUE.,
in  &PARM01 of data

-Matt


On Apr 20, 2009, at 10:21 AM, Nataliya Stashchuk wrote:


Does anybody know how to fix Eta as zero at the free surface?

Regards,
Nataliya
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