petsc-3.3-p7 2013-05-11
TSSetIFunction
Set the function to compute F(t,U,U_t) where F = 0 is the DAE to be solved.
Synopsis
#include "petscts.h"
PetscErrorCode TSSetIFunction(TS ts,Vec res,TSIFunction f,void *ctx)
Logically Collective on TS
Input Parameters
| ts | - the TS context obtained from TSCreate()
|
| r | - vector to hold the residual (or PETSC_NULL to have it created internally)
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| f | - the function evaluation routine
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| ctx | - user-defined context for private data for the function evaluation routine (may be PETSC_NULL)
|
Calling sequence of f
f(TS ts,PetscReal t,Vec u,Vec u_t,Vec F,ctx);
| t | - time at step/stage being solved
|
| u | - state vector
|
| u_t | - time derivative of state vector
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| F | - function vector
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| ctx | - [optional] user-defined context for matrix evaluation routine
|
Important
The user MUST call either this routine, TSSetRHSFunction(). This routine must be used when not solving an ODE, for example a DAE.
Keywords
TS, timestep, set, DAE, Jacobian
See Also
TSSetRHSJacobian(), TSSetRHSFunction(), TSSetIJacobian()
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
Examples
src/ts/examples/tutorials/ex8.c.html
src/ts/examples/tutorials/ex10.c.html
src/ts/examples/tutorials/ex14.c.html
src/ts/examples/tutorials/ex15.c.html
src/ts/examples/tutorials/ex16.c.html
src/ts/examples/tutorials/ex17.c.html
src/ts/examples/tutorials/ex18.c.html
src/ts/examples/tutorials/ex22.c.html
src/ts/examples/tutorials/ex23.c.html
src/ts/examples/tutorials/ex24.c.html
src/ts/examples/tutorials/ex25.c.html