[CIG-MC] coupler & multigrid solver?

[Eh Tan]

Hi Magali,


> So, I'm wondering why doesn't the coupler work with multigrid? Is this
> something that should work,
> but hasn't been tested, or is there something about how the
> information gets past between the
> coupled models that prevents the use of the multigrid solver?
>    

The coupler currently doesn't work with multigrid.

For the coupler to work, the boundary condition arrays of embedded 
solver needs to be updated at every time step. When I wrote the code I 
wasn't familiar with multigrid solver and didn't know how to update the 
boundary condition arrays for multigrid solver. So the multigrid coupler 
was not implemented. Now, I know the multigrid solver better and find 
that the implementation won't be difficult, but I never get around to 
write the code. Since you are motivated and understand CitcomS' internal 
quite well, maybe we can work together to write the code?

PS: I think most people on the mailing list don't care about the 
implementation. Maybe we should discuss the detail further off the list.



Eh Tan
-------
Postdoctoral Fellow
Institute for Geophysics
University of Texas, Austin
J.J. Pickle Research Campus, Bldg 196 (ROC)
10100 Burnet Rd. (R2200),
Austin, TX 78758-4445
(512) 475-9568