PetscDSGetRHSResidual#

Get the pointwise RHS residual function for explicit timestepping for a given test field

Synopsis#

#include "petscds.h" 
PetscErrorCode PetscDSGetRHSResidual(PetscDS ds, PetscInt f, PetscPointFn **f0, PetscPointFn **f1)

Not Collective

Input Parameters#

ds - The PetscDS
f - The test field number

Output Parameters#

f0 - integrand for the test function term, see PetscPointFn
f1 - integrand for the test function gradient term, see PetscPointFn

Note#

We are using a first order FEM model for the weak form: \( \int_\Omega \phi f_0(u, u_t, \nabla u, x, t) + \nabla\phi \cdot {\vec f}_1(u, u_t, \nabla u, x, t)\)

Level#

intermediate

Location#

src/dm/dt/interface/dtds.c

Index of all DT routines
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Index of all manual pages