# A finite volume method for the Laplace equation on almost arbitrary two-dimensional grids

ESAIM: Mathematical Modelling and Numerical Analysis (2010)

- Volume: 39, Issue: 6, page 1203-1249
- ISSN: 0764-583X

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topDomelevo, Komla, and Omnes, Pascal. "A finite volume method for the Laplace equation on almost arbitrary two-dimensional grids." ESAIM: Mathematical Modelling and Numerical Analysis 39.6 (2010): 1203-1249. <http://eudml.org/doc/194302>.

@article{Domelevo2010,

abstract = {
We present a finite volume method based on the integration of the Laplace
equation on both the cells of a primal almost arbitrary two-dimensional
mesh and those of a
dual mesh obtained by joining the centers of the cells of the primal mesh.
The key ingredient is the definition of discrete gradient and divergence
operators verifying a discrete Green formula.
This method generalizes an existing finite volume method that
requires “Voronoi-type” meshes.
We show the equivalence of this finite volume method with a non-conforming
finite element method with basis functions being P1 on the cells,
generally called “diamond-cells”, of a third mesh.
Under geometrical conditions on these diamond-cells,
we prove a first-order convergence both in the $\xHone_0$ norm
and in the L² norm.
Superconvergence results are obtained on certain types of homothetically refined grids.
Finally, numerical experiments confirm these results and also show second-order convergence
in the L² norm on general grids.
They also indicate that this method performs particularly well for the approximation
of the gradient of the solution, and may be used on degenerating triangular grids.
An example of application on non-conforming locally refined grids is given.
},

author = {Domelevo, Komla, Omnes, Pascal},

journal = {ESAIM: Mathematical Modelling and Numerical Analysis},

keywords = {Finite volume method; non-conforming finite element method;
Laplace equation; discrete Green formula; diamond-cell; error estimates;
convergence; superconvergence; arbitrary meshes; degenerating meshes; non-conforming meshes.; nonconforming finite element method; error estimate; nonconforming meshes; finite volume method; Laplace equation; numerical experiments},

language = {eng},

month = {3},

number = {6},

pages = {1203-1249},

publisher = {EDP Sciences},

title = {A finite volume method for the Laplace equation on almost arbitrary two-dimensional grids},

url = {http://eudml.org/doc/194302},

volume = {39},

year = {2010},

}

TY - JOUR

AU - Domelevo, Komla

AU - Omnes, Pascal

TI - A finite volume method for the Laplace equation on almost arbitrary two-dimensional grids

JO - ESAIM: Mathematical Modelling and Numerical Analysis

DA - 2010/3//

PB - EDP Sciences

VL - 39

IS - 6

SP - 1203

EP - 1249

AB -
We present a finite volume method based on the integration of the Laplace
equation on both the cells of a primal almost arbitrary two-dimensional
mesh and those of a
dual mesh obtained by joining the centers of the cells of the primal mesh.
The key ingredient is the definition of discrete gradient and divergence
operators verifying a discrete Green formula.
This method generalizes an existing finite volume method that
requires “Voronoi-type” meshes.
We show the equivalence of this finite volume method with a non-conforming
finite element method with basis functions being P1 on the cells,
generally called “diamond-cells”, of a third mesh.
Under geometrical conditions on these diamond-cells,
we prove a first-order convergence both in the $\xHone_0$ norm
and in the L² norm.
Superconvergence results are obtained on certain types of homothetically refined grids.
Finally, numerical experiments confirm these results and also show second-order convergence
in the L² norm on general grids.
They also indicate that this method performs particularly well for the approximation
of the gradient of the solution, and may be used on degenerating triangular grids.
An example of application on non-conforming locally refined grids is given.

LA - eng

KW - Finite volume method; non-conforming finite element method;
Laplace equation; discrete Green formula; diamond-cell; error estimates;
convergence; superconvergence; arbitrary meshes; degenerating meshes; non-conforming meshes.; nonconforming finite element method; error estimate; nonconforming meshes; finite volume method; Laplace equation; numerical experiments

UR - http://eudml.org/doc/194302

ER -

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