TSDiscGradSetFormulation#

Set the construction method for S, F, and grad F from the formulation u_t = S(u) grad F(u) for TSDISCGRAD

Synopsis#

#include "petscts.h"   
PetscErrorCode TSDiscGradSetFormulation(TS ts, PetscErrorCode (*Sfunc)(TS, PetscReal, Vec, Mat, void *), PetscErrorCode (*Ffunc)(TS, PetscReal, Vec, PetscScalar *, void *), PetscErrorCode (*Gfunc)(TS, PetscReal, Vec, Vec, void *), void *ctx)

Not Collective

Input Parameters#

  • ts - timestepping context

  • Sfunc - constructor for the S matrix from the formulation

  • Ffunc - functional F from the formulation

  • Gfunc - constructor for the gradient of F from the formulation

  • ctx - optional context for the functions

Calling sequence of Sfunc#

PetscErrorCode Sfunc(TS ts, PetscReal time, Vec u, Mat S, void *ctx)

Calling sequence of Ffunc#

PetscErrorCode Ffunc(TS ts, PetscReal time, Vec u, PetscScalar *F, void *ctx)

Calling sequence of Gfunc#

PetscErrorCode Gfunc(TS ts, PetscReal time, Vec u, Vec G, void *ctx)

See Also#

TS: Scalable ODE and DAE Solvers, TSDISCGRAD, TSDiscGradGetFormulation()

Level#

Intermediate

Location#

src/ts/impls/implicit/discgrad/tsdiscgrad.c

Implementations#

TSDiscGradSetFormulation_DiscGrad(TS ts, PetscErrorCode (*Sfunc)(TS, PetscReal, Vec, Mat, void *), PetscErrorCode (*Ffunc)(TS, PetscReal, Vec, PetscScalar *, void *), PetscErrorCode (*Gfunc) in src/ts/impls/implicit/discgrad/tsdiscgrad.c

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