petsc-3.11.4 2019-09-28

DMDACreateSection

Create a PetscSection inside the DMDA that describes data layout. This allows multiple fields with different numbers of dofs on vertices, cells, and faces in each direction.

Synopsis

#include "petscdmda.h"   
PetscErrorCode DMDACreateSection(DM dm, const PetscInt numComp[], const PetscInt numDof[], const PetscInt numFaceDof[], PetscSection *s)

Input Parameters

Note

The default DMDA numbering is as follows

- Cells: [0, nC) - Vertices: [nC, nC+nV) - X-Faces: [nC+nV, nC+nV+nXF) normal is +- x-dir - Y-Faces: [nC+nV+nXF, nC+nV+nXF+nYF) normal is +- y-dir - Z-Faces: [nC+nV+nXF+nYF, nC+nV+nXF+nYF+nZF) normal is +- z-dir

We interpret the default DMDA partition as a cell partition, and the data assignment as a cell assignment.

Level

developer

Location

src/dm/impls/da/dalocal.c
Index of all DMDA routines
Table of Contents for all manual pages
Index of all manual pages

	dm	- The DMDA
	numFields	- The number of fields
	numComp	- The number of components in each field
	numDof	- The number of dofs per dimension for each field
	numFaceDof	- The number of dofs per face for each field and direction, or NULL