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

[mitgcm-support at dev.mitgcm.org]

Allen,

 d2u/dz2 is written in a finite volume like
form

  1/vol_of_u_cell dk(Area_z viscAz du/dz )

where dk(phi) is phi(k)-phi(k+1)

I think the the inner term ( du/dz ) is discretised with u=0 
and w(0) to give a noslip boundary condition.

Chris

> yeah, I think the noslip is on- maybe you don't have to come by- do you know the finite difference 
> approximation for d^2u/dz^2 at the bottomost (u,v) level ?
> 
> 
> 
> .
> .
> .
> .
> 
> -------- u(2)
> 
> ------------ w(2)
> 
> -------- u(1)
> 
> ------------ w(1)
> 
> -------- u(0)    <-------------- what is d^2u/dz^2 here assuming no slip ?
> 
> ------------ w(0)
> 
> 
> 
> 
> Thank you. -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)