petsc-3.12.5 2020-03-29

DMBoundaryConditionType

indicates what type of boundary condition is to be imposed

Synopsis

typedef enum {DM_BC_ESSENTIAL = 1, DM_BC_ESSENTIAL_FIELD = 5, DM_BC_NATURAL = 2, DM_BC_NATURAL_FIELD = 6, DM_BC_ESSENTIAL_BD_FIELD = 9, DM_BC_NATURAL_RIEMANN = 10} DMBoundaryConditionType;

Note: This flag indicates the type of function which will define the condition

DM_BC_ESSENTIAL       - A Dirichlet condition using a function of the coordinates

DM_BC_ESSENTIAL_FIELD - A Dirichlet condition using a function of the coordinates and auxiliary field data

DM_BC_ESSENTIAL_BD_FIELD - A Dirichlet condition using a function of the coordinates, facet normal, and auxiliary field data

DM_BC_NATURAL         - A Neumann condition using a function of the coordinates

DM_BC_NATURAL_FIELD   - A Neumann condition using a function of the coordinates and auxiliary field data

DM_BC_NATURAL_RIEMANN - A flux condition which determines the state in ghost cells

The user can check whether a boundary condition is essential using (type & DM_BC_ESSENTIAL), and similarly for natural conditions (type & DM_BC_NATURAL)

Level

beginner

Location

src/dm/../../include/petscdmtypes.h

Examples