DMDA — PETSc 3.21.4 documentation

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# DMDA

“da” - A `DM` object that is used to manage data for a structured grid in 1, 2, or 3 dimensions. In the global representation of the vector each process stores a non-overlapping rectangular (or slab in 3d) portion of the grid points. In the local representation these rectangular regions (slabs) are extended in all directions by a stencil width set with `DMDASetStencilWidth()`. The vectors can be thought of as either cell centered or vertex centered on the mesh. But some variables cannot be cell centered and others vertex centered; see the documentation for `DMSTAG`, a similar `DM` implementation which supports more general staggered grids.

## See Also

DMDA - Creating vectors for structured grids, `DMType`, `DMCOMPOSITE`, `DMSTAG`, `DMDACreate()`, `DMCreate()`, `DMSetType()`, `DMDASetStencilWidth()`, `DMDASetStencilType()`, `DMDAStencilType`

## Level

intermediate

## Location

src/dm/impls/da/dacreate.c

## Examples

src/dm/field/tutorials/ex1.c
src/dm/impls/stag/tutorials/ex1.c
src/dm/tutorials/ex3.c
src/dm/tutorials/ex7.c
src/dm/tutorials/ex10.c
src/dm/tutorials/ex15.c
src/dm/impls/stag/tutorials/ex4.c
src/dm/tutorials/ex19.c
src/dm/tutorials/ex51.c
src/dm/tutorials/ex1.c

Index of all DMDA routines
Table of Contents for all manual pages
Index of all manual pages