PetscDSGetBdResidual#
Get the pointwise boundary residual function for a given test field
Synopsis#
#include "petscds.h" 
PetscErrorCode PetscDSGetBdResidual(PetscDS ds, PetscInt f, void (**f0)(PetscInt dim, PetscInt Nf, PetscInt NfAux, const PetscInt uOff[], const PetscInt uOff_x[], const PetscScalar u[], const PetscScalar u_t[], const PetscScalar u_x[], const PetscInt aOff[], const PetscInt aOff_x[], const PetscScalar a[], const PetscScalar a_t[], const PetscScalar a_x[], PetscReal t, const PetscReal x[], const PetscReal n[], PetscInt numConstants, const PetscScalar constants[], PetscScalar f0[]), void (**f1)(PetscInt, PetscInt, PetscInt, const PetscInt[], const PetscInt[], const PetscScalar[], const PetscScalar[], const PetscScalar[], const PetscInt[], const PetscInt[], const PetscScalar[], const PetscScalar[], const PetscScalar[], PetscReal, const PetscReal[], const PetscReal[], PetscInt, const PetscScalar[], PetscScalar[]))
Not Collective
Input Parameters#
- ds - The PetscDS 
- f - The test field number 
Output Parameters#
- f0 - boundary integrand for the test function term 
- f1 - boundary integrand for the test function gradient term 
Calling sequence of f0#
- dim - the spatial dimension 
- Nf - the number of fields 
- NfAux - the number of auxiliary fields 
- uOff - the offset into u[] and u_t[] for each field 
- uOff_x - the offset into u_x[] for each field 
- u - each field evaluated at the current point 
- u_t - the time derivative of each field evaluated at the current point 
- u_x - the gradient of each field evaluated at the current point 
- aOff - the offset into a[] and a_t[] for each auxiliary field 
- aOff_x - the offset into a_x[] for each auxiliary field 
- a - each auxiliary field evaluated at the current point 
- a_t - the time derivative of each auxiliary field evaluated at the current point 
- a_x - the gradient of auxiliary each field evaluated at the current point 
- t - current time 
- x - coordinates of the current point 
- n - unit normal at the current point 
- numConstants - number of constant parameters 
- constants - constant parameters 
- f0 - output values at the current point 
Note#
The calling sequence of f1 is identical, and therefore omitted for brevity.
We are using a first order FEM model for the weak form:
See Also#
Level#
intermediate
Location#
Index of all DT routines
Table of Contents for all manual pages
Index of all manual pages