PetscFEIntegrateResidual#
Produce the element residual vector for a chunk of elements by quadrature integration
Synopsis#
#include "petscfe.h"
PetscErrorCode PetscFEIntegrateResidual(PetscDS ds, PetscFormKey key, PetscInt Ne, PetscFEGeom *cgeom, const PetscScalar coefficients[], const PetscScalar coefficients_t[], PetscDS probAux, const PetscScalar coefficientsAux[], PetscReal t, PetscScalar elemVec[])
Not Collective
Input Parameters#
ds - The
PetscDS
specifying the discretizations and continuum functionskey - The (label+value, 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 discretizationscoefficientsAux - The array of FEM auxiliary basis coefficients for the elements
t - The time
Output Parameter#
elemVec - the element residual vectors from each element
Note#
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)
See Also#
Level#
intermediate
Location#
Implementations#
PetscFEIntegrateResidual_Basic() in src/dm/dt/fe/impls/basic/febasic.c
PetscFEIntegrateResidual_OpenCL() in src/dm/dt/fe/impls/opencl/feopencl.c
Index of all FE routines
Table of Contents for all manual pages
Index of all manual pages