petsc-3.14.6 2021-03-30

DMTSSetBoundaryLocal

set the function for essential boundary data for a local implicit function evaluation. It should set the essential boundary data for the local portion of the solution X, as well its time derivative X_t (if it is not NULL). Vectors are initialized to zero before this function, so it is only needed for non homogeneous data.

Synopsis

#include "petscts.h" 
PetscErrorCode DMTSSetBoundaryLocal(DM dm, PetscErrorCode (*func)(DM, PetscReal, Vec, Vec, void *), void *ctx)

Note that this function is somewhat optional: boundary data could potentially be inserted by a function passed to DMTSSetIFunctionLocal(). The use case for this function is for discretizations with constraints (see DMGetDefaultConstraints()): this function inserts boundary values before constraint interpolation.

Logically Collective

Input Arguments

	dm	- DM to associate callback with
	func	- local function evaluation
	ctx	- context for function evaluation

Level

intermediate

Location

src/ts/utils/dmlocalts.c

Examples