PetscGaussLobattoLegendreElementAdvectionCreate

computes the advection operator for a single 1d GLL element

Synopsis

#include "petscdt.h" 
PetscErrorCode PetscGaussLobattoLegendreElementAdvectionCreate(PetscInt n, PetscReal nodes[], PetscReal weights[], PetscReal ***AA)

Not Collective

Input Parameters

• n - the number of GLL nodes

• nodes - the GLL nodes, of length n

• weights - the GLL weights, of length n

Output Parameter

• AA - the stiffness element, of dimension n by n

Notes

Destroy this with PetscGaussLobattoLegendreElementAdvectionDestroy()

This is the same as the Gradient operator multiplied by the diagonal mass matrix

You can access entries in this array with AA[i][j] but in memory it is stored in contiguous memory, row-oriented

See Also

PetscDTGaussLobattoLegendreQuadrature(), PetscGaussLobattoLegendreElementLaplacianCreate(), PetscGaussLobattoLegendreElementAdvectionDestroy()

Level

beginner

Location

src/dm/dt/interface/dt.c

Examples

src/tao/unconstrained/tutorials/burgers_spectral.c
src/tao/unconstrained/tutorials/spectraladjointassimilation.c
src/ts/tutorials/ex50.c

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