petsc-3.13.1 2020-05-02
TSSetI2Function
Set the function to compute F(t,U,U_t,U_tt) where F = 0 is the DAE to be solved.
Synopsis
#include "petscts.h"
PetscErrorCode TSSetI2Function(TS ts,Vec F,TSI2Function fun,void *ctx)
Logically Collective on TS
Input Parameters
| ts | - the TS context obtained from TSCreate()
|
| F | - vector to hold the residual (or NULL to have it created internally)
|
| fun | - the function evaluation routine
|
| ctx | - user-defined context for private data for the function evaluation routine (may be NULL)
|
Calling sequence of fun
PetscErrorCode fun(TS ts,PetscReal t,Vec U,Vec U_t,Vec U_tt,Vec F,ctx);
| 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)
|
See Also
TSSetI2Jacobian()
Level
beginner
Location
src/ts/interface/ts.c
Index of all TS routines
Table of Contents for all manual pages
Index of all manual pages