DMTSSetBoundaryLocal — PETSc 3.21.4 documentation

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# DMTSSetBoundaryLocal

set the function for essential boundary data for a local implicit function evaluation.

## Synopsis

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

Logically Collective

## Input Parameters

- dm - `DM` to associate callback with

- func - local function evaluation

- ctx - context for function evaluation

## Notes

`func` should set the essential boundary data for the local portion of the solution, as well its time derivative (if it is not `NULL`).

Vectors are initialized to zero before this function, so it is only needed for non homogeneous data.

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.

## See Also

TS: Scalable ODE and DAE Solvers, `DM`, `TS`, `DMTSSetIFunction()`, `DMTSSetIJacobianLocal()`

## Level

intermediate

## Location

src/ts/utils/dmlocalts.c

## Examples

src/ts/tutorials/ex30.c
src/ts/tutorials/ex47.c
src/ts/tutorials/ex77.c
src/ts/tutorials/ex46.c
src/ts/tutorials/ex53.c
src/ts/tutorials/ex76.c
src/ts/tutorials/ex45.c
src/ts/tutorials/ex48.c
src/ts/tutorials/ex18.c
src/ts/tutorials/ex11.c

Index of all TS routines
Table of Contents for all manual pages
Index of all manual pages