[Mitgcm-support] Bottom boundary Ekman layer in tank experiment

[mitgcm-support at dev.mitgcm.org]

Chris Hill wrote:
> 
> Allen,
> 
>  I have stuff until 5pm. I can call by 17 at 5.
> Meantime, the linear and quadratic bottom drag terms are
> off by default. However, there is also a boundary condition
> on the vertical viscosity. That I believe is set to
> noslip in the runs Helen has. That acts somewhat like
> bottom drag and will produce an Ekman layer at the bottom.
> Pretty certain that the noslip bc. is on, without it
> the disk forced , flat bottom experiments spin up
> so fast that they exceed any reasonable CFL and crash.
> 
> Chris
> 
> Allen Kuo wrote:
> >
> > Chris: Do you have any time today to check out whether I have a bottom drag operating
> > in my code. I don't see it turned on explicitly in my "data" file so I would guess it isn't,
> > but if assume it is not acting, I don't get the proper Ekman flow. -Allen
> >
> > Allen C Kuo
> > Massachusetts Institute of Technology
> > Dept of Earth Atmospheric & Planetary Sciences
> > Room 54-1721 , 77 Massachusetts Ave
> > Cambridge, MA 02139
> >
> > http://rossby.mit.edu/~akuo
> >
> > (617) 253-5935 (office)
> > (617) 253-3585 (lab)
> > (617) 253 6208 (fax)