[petsc-users] Where can I learn about combining grids for a Laplacian

[Alletto, John M]

I have a 3D Laplacian program that I wrote in matlab that I would like to transition to PETSc.

In my current program I have an inner cube which utilizes a 27 point uniform stencil
surrounded by an outer cubical which uses a smaller stencil on a variable grid.

I require the inner cubical to contain accurate results and do not care if error accumulates in the outer regions.

Where can I learn about combining grids for PETSc implementation?


Many Thanks
John
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