DMSTAG#
"stag" - A DM object representing a “staggered grid” or a structured cell complex.
Notes#
This implementation parallels the DMDA implementation in many ways, but allows degrees of freedom
to be associated with all “strata” in a logically-rectangular grid.
Each stratum can be characterized by the dimension of the entities (“points”, to borrow the DMPLEX
terminology), from 0- to 3-dimensional.
In some cases this numbering is used directly, for example with DMStagGetDOF().
To allow easier reading and to some extent more similar code between different-dimensional implementations
of the same problem, we associate canonical names for each type of point, for each dimension of DMStag.
1-dimensional
DMSTAGobjects have vertices (0D) and elements (1D).2-dimensional
DMSTAGobjects have vertices (0D), faces (1D), and elements (2D).3-dimensional
DMSTAGobjects have vertices (0D), edges (1D), faces (2D), and elements (3D).
This naming is reflected when viewing a DMSTAG object with DMView(), and in forming
convenient options prefixes when creating a decomposition with DMCreateFieldDecomposition().
See Also#
DMSTAG: Staggered, Structured Grids in PETSc, DM, DMPRODUCT, DMDA, DMPLEX, DMStagCreate1d(), DMStagCreate2d(), DMStagCreate3d(), DMType, DMCreate(),
DMSetType(), DMStagVecSplitToDMDA()
Level#
beginner
Location#
Index of all DMStag routines
Table of Contents for all manual pages
Index of all manual pages