petsc-3.14.6 2021-03-30

PetscDualSpaceApplyFVM

Apply a functional from the dual space basis to an input function by assuming a point evaluation functional at the cell centroid.

Synopsis

#include "petscfe.h" 
PetscErrorCode PetscDualSpaceApplyFVM(PetscDualSpace sp, PetscInt f, PetscReal time, PetscFVCellGeom *cgeom, PetscInt Nc, PetscErrorCode (*func)(PetscInt, PetscReal, const PetscReal [], PetscInt, PetscScalar *, void *), void *ctx, PetscScalar *value)

Input Parameters

	sp	- The PetscDualSpace object
	f	- The basis functional index
	time	- The time
	cgeom	- A context with geometric information for this cell, we currently just use the centroid
	Nc	- The number of components for the function
	func	- The input function
	ctx	- A context for the function

Output Parameter

value

- The output value (scalar)

Note: The calling sequence for the callback func is given by

func(PetscInt dim, PetscReal time, const PetscReal x[],

     PetscInt numComponents, PetscScalar values[], void *ctx)

and the idea is to evaluate the functional as an integral

n(f) = int dx n(x) . f(x)

where both n and f have Nc components.

Level

beginner

Location

src/dm/dt/dualspace/interface/dualspace.c
Index of all DUALSPACE routines
Table of Contents for all manual pages
Index of all manual pages