Search found 6 matches

by dupontf
Thu Oct 27, 2005 2:46 pm
Forum: ROMS Problems
Topic: ROMS for highly stratified fuild
Replies: 12
Views: 8222

well, with a max depth of 320m, the external time step should be below 4s but with a baroclinic phase speed of 3m/s, you should be able to use a tracer timestep of up to 80s. Therefore 25s should be fine. i am at loss. My guess would be to verify your baroclinic phase speed calcultion. I may verify ...
by dupontf
Thu Oct 27, 2005 1:05 pm
Forum: ROMS Problems
Topic: ROMS for highly stratified fuild
Replies: 12
Views: 8222

25 s for tracer does seem small. what is your spatial resolution and total depth?
by dupontf
Wed Oct 26, 2005 6:28 pm
Forum: ROMS Problems
Topic: ROMS for highly stratified fuild
Replies: 12
Views: 8222

your time step may be limited by strong baroclinic effects (not just the external gravity phase speed). Have you tried to compute the baroclinic phase speed for such a stratified system?

Fred.
by dupontf
Mon Nov 29, 2004 11:11 pm
Forum: ROMS Usage
Topic: Open Boudary Conditions: Inflow
Replies: 11
Views: 8053

OBC conditions

Yes, it would be desirable and somewhat more intiutive to be able to use Dirichlet boundary condition for elevation. Tidal applications are one reason. (I think someone mentioned this problem already in this forum). Roms has been written with the idea of using spunge layers to enforce the BCs instea...
by dupontf
Tue Sep 16, 2003 7:03 pm
Forum: ROMS Usage
Topic: Open Boudary Conditions: Inflow
Replies: 11
Views: 8053

open boundary

Has anyone tried a testcase similar to the Chapman paper (JPO, 1985) in a 2D/3D setup? (A wind blowing along a shelf break with radiative BCs on both inflow/outflow; north and south bdy closed) From our experience, for the 2D case, the available BCs don't seem to reproduce the desired result. In the...
by dupontf
Tue Sep 16, 2003 6:45 pm
Forum: ROMS Problems
Topic: Is there anyone to try using Linux to run the model?
Replies: 7
Views: 4296

Just in case somebody hasn't replied yet (I hope not!), we did compiled and run ROMS using g77 only on a linux box.

Fred
dupontf@mar.dfo-mpo.gc.ca