petsc-3.6.4 2016-04-12
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Provide a function that computes the solution of the ODE or DAE


#include "petscts.h"  
PetscErrorCode  TSSetSolutionFunction(TS ts,PetscErrorCode (*f)(TS,PetscReal,Vec,void*),void *ctx)
Logically Collective on TS

Input Parameters

ts - the TS context obtained from TSCreate()
f - routine for evaluating the solution
ctx - [optional] user-defined context for private data for the function evaluation routine (may be NULL)

Calling sequence of func

    func (TS ts,PetscReal t,Vec u,void *ctx);

t - current timestep
u - output vector
ctx - [optional] user-defined function context


This routine is used for testing accuracy of time integration schemes when you already know the solution. If analytic solutions are not known for your system, consider using the Method of Manufactured Solutions to create closed-form solutions with non-physical forcing terms.

For low-dimensional problems solved in serial, such as small discrete systems, TSMonitorLGError() can be used to monitor the error history.


TS, timestep, set, right-hand-side, function

See Also

TSSetRHSJacobian(), TSSetIJacobian(), TSComputeSolutionFunction(), TSSetForcingFunction()

Index of all TS routines
Table of Contents for all manual pages
Index of all manual pages