[MITgcm-support] ptracer and default boundary conditions

[Matthew Mazloff]

I believe default is Neumann boundary conditions. To get what you want you need Dirichlet, so you need to prescribe an open boundary file with values all 0

-Matt




> On Apr 7, 2017, at 11:32 AM, Daniel Goldberg <dngoldberg at gmail.com> wrote:
> 
> Hello All
> 
> It's my first time using ptracers. In my setup I am using OBCS at all boundaries, specifying U and V (inflow in some places, out in others). I am not using Orlanski or Stevens bc's. I want the tracer to simply be advected out with the outgoing flow, and incoming flow to have zero tracer concentration, and I have not defined any boundary files for ptracers in data.obcs. 
> 
> My assumption is that by default I will get this (simple outflow, no inflow), but the online ptracer documentation does not explicitly say this, so I would just like to make sure.
> 
> Thanks very much!
> Dan
> 
> -- 
> 
> Daniel Goldberg, PhD
> Lecturer in Glaciology
> School of Geosciences, University of Edinburgh
> Geography Building, Drummond Street, Edinburgh EH8 9XP
> 
> 
> em: D <mailto:dgoldber at mit.edu>an.Goldberg at ed.ac.uk <mailto:an.Goldberg at ed.ac.uk>
> web: http://ocean.mit.edu/~dgoldberg <http://ocean.mit.edu/~dgoldberg>_______________________________________________
> MITgcm-support mailing list
> MITgcm-support at mitgcm.org
> http://mitgcm.org/mailman/listinfo/mitgcm-support

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mitgcm.org/pipermail/mitgcm-support/attachments/20170407/20db1793/attachment.htm>