DMTSSetI2Function#

set TS implicit function evaluation function for 2nd order systems

Synopsis#

#include "petscts.h" 
PetscErrorCode DMTSSetI2Function(DM dm, TSI2Function fun, void *ctx)

Not Collective

Input Parameters#

  • dm - DM to be used with TS

  • fun - function evaluation routine

  • ctx - context for residual evaluation

Calling sequence of fun#

PetscErrorCode fun(TS ts, PetscReal t, Vec U, Vec U_t, Vec U_tt, Vec F,void *ctx);

  • ts - the TS context obtained from TSCreate()

  • t - time at step/stage being solved

  • U - state vector

  • U_t - time derivative of state vector

  • U_tt - second time derivative of state vector

  • F - function vector

  • ctx - [optional] user-defined context for matrix evaluation routine (may be NULL)

Note#

TSSetI2Function() is normally used, but it calls this function internally because the user context is actually associated with the DM.

See Also#

TS: Scalable ODE and DAE Solvers, DM, TS, TSSetI2Function()

Level#

advanced

Location#

src/ts/utils/dmts.c

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