On the second-order convergence of a function reconstructed from finite volume approximations of the Laplace equation on Delaunay-Voronoi meshes - Archive ouverte HAL Access content directly
Journal Articles ESAIM: Mathematical Modelling and Numerical Analysis Year : 2011

## On the second-order convergence of a function reconstructed from finite volume approximations of the Laplace equation on Delaunay-Voronoi meshes

(1, 2)
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Pascal Omnes

#### Abstract

Cell-centered and vertex-centered finite volume schemes for the Laplace equation with homogeneous Dirichlet boundary conditions are considered on a triangular mesh and on the Voronoi diagram associated to its vertices. A broken $P^1$ function is constructed from the solutions of both schemes. When the domain is two-dimensional polygonal convex, it is shown that this reconstruction converges with second-order accuracy towards the exact solution in the~$L^2$ norm, under the sufficient condition that the right-hand side of the Laplace equation belongs to~$H^1(\Omega)$.

#### Domains

Mathematics [math] Numerical Analysis [math.NA]

### Dates and versions

cea-00430941 , version 1 (10-11-2009)
cea-00430941 , version 2 (13-04-2015)

### Identifiers

• HAL Id : cea-00430941 , version 2
• DOI :

### Cite

Pascal Omnes. On the second-order convergence of a function reconstructed from finite volume approximations of the Laplace equation on Delaunay-Voronoi meshes. ESAIM: Mathematical Modelling and Numerical Analysis, 2011, 45 (4), pp.627--650. ⟨10.1051/m2an/2010068⟩. ⟨cea-00430941v2⟩

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