petsc-3.7.7 2017-09-25
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DMGetBoundary

Add a boundary condition to the model

Synopsis

#include "petscdm.h"          
#include "petscdmlabel.h"     
PetscErrorCode DMGetBoundary(DM dm, PetscInt bd, PetscBool *isEssential, const char **name, const char **labelname, PetscInt *field, PetscInt *numcomps, const PetscInt **comps, void (**func)(), PetscInt *numids, const PetscInt **ids, void **ctx)

Input Parameters

dm - The mesh object
bd - The BC number

Output Parameters

isEssential - Flag for an essential (Dirichlet) condition, as opposed to a natural (Neumann) condition
name - The BC name
labelname - The label defining constrained points
field - The field to constrain
numcomps - The number of constrained field components
comps - An array of constrained component numbers
bcFunc - A pointwise function giving boundary values
numids - The number of DMLabel ids for constrained points
ids - An array of ids for constrained points
ctx - An optional user context for bcFunc

Options Database Keys

-bc_<boundary name> <num> - Overrides the boundary ids
-bc_<boundary name>_comp <num> - Overrides the boundary components

See Also

DMAddBoundary()

Level:developer
Location:
src/dm/interface/dm.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages