[petsc-users] DMDA with cell-centered finite volume method?

[Klaij, Christiaan]

> > Is it possible to use DMDAs in the context of a cell-centered
> > finite volume method?  For example, a 2D grid with 9-by-9 grid
> > points would have 8-by-8 unknowns, located in the cell
> > centers. After reading the documentation, I got the impression
> > that the unknowns must be situated at the grid points, or am I
> > mistaken?
> >
>
> Just make an 8x8 grid. Geometric refinement and coarsening is a little more
> delicate. I have used the hack of saying that the grid is periodic so that
> refinement is to 2n instead of 2n-1. You might want to use Q0 interpolation
> in this case.

Thanks Jed, but how would I store the grid point coordinates? The grid could
be non-uniform (stretching, deforming) so I still need a 9-by-9 DM to store
the grid point coordinates, right?


dr. ir. Christiaan Klaij
CFD Researcher
Research & Development
E mailto:C.Klaij at marin.nl
T +31 317 49 33 44

MARIN
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