PetscDSGetExactSolution#

Get the pointwise exact solution function for a given test field

Synopsis#

#include "petscds.h" 
PetscErrorCode PetscDSGetExactSolution(PetscDS prob, PetscInt f, PetscErrorCode (**sol)(PetscInt dim, PetscReal t, const PetscReal x[], PetscInt Nc, PetscScalar u[], void *ctx), void **ctx)

Not Collective

Input Parameters#

  • prob - The PetscDS

  • f - The test field number

Output Parameters#

  • exactSol - exact solution for the test field

  • exactCtx - exact solution context

Calling sequence of exactSol#

  PetscErrorCode sol(PetscInt dim, PetscReal t, const PetscReal x[], PetscInt Nc, PetscScalar u[], void *ctx)

  • dim - the spatial dimension

  • t - current time

  • x - coordinates of the current point

  • Nc - the number of field components

  • u - the solution field evaluated at the current point

  • ctx - a user context

See Also#

PetscDS, PetscDSSetExactSolution(), PetscDSGetExactSolutionTimeDerivative()

Level#

intermediate

Location#

src/dm/dt/interface/dtds.c

Examples#

src/snes/tutorials/ex13.c
src/snes/tutorials/ex69.c
src/snes/tutorials/ex71.c
src/snes/tutorials/ex76.c
src/tao/tutorials/ex1.c
src/tao/tutorials/ex2.c
src/ts/tutorials/ex46.c
src/ts/tutorials/ex47.c
src/ts/tutorials/ex53.c
src/ts/tutorials/ex76.c
src/ts/tutorials/ex77.c

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