#include "petscfe.h"
PetscErrorCode PetscFEIntegrateResidual(PetscDS prob, PetscInt field, PetscInt Ne, PetscFEGeom *cgeom,
const PetscScalar coefficients[], const PetscScalar coefficients_t[], PetscDS probAux, const PetscScalar coefficientsAux[], PetscReal t, PetscScalar elemVec[])
Not collective
| fem | - The PetscFE object for the field being integrated | |
| prob | - The PetscDS specifying the discretizations and continuum functions | |
| field | - The field being integrated | |
| Ne | - The number of elements in the chunk | |
| cgeom | - The cell geometry for each cell in the chunk | |
| coefficients | - The array of FEM basis coefficients for the elements | |
| coefficients_t | - The array of FEM basis time derivative coefficients for the elements | |
| probAux | - The PetscDS specifying the auxiliary discretizations | |
| coefficientsAux | - The array of FEM auxiliary basis coefficients for the elements | |
| t | - The time |
Output Parameter
Loop over batch of elements (e):
Loop over quadrature points (q):
Make u_q and gradU_q (loops over fields,Nb,Ncomp) and x_q
Call f_0 and f_1
Loop over element vector entries (f,fc --> i):
elemVec[i] += \psi^{fc}_f(q) f0_{fc}(u, \nabla u) + \nabla\psi^{fc}_f(q) \cdot f1_{fc,df}(u, \nabla u)