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- Andrea Bonito, Ricardo H. Nochetto
- SIAM J. Numerical Analysis
- 2010

We analyze an adaptive discontinuous finite element method (ADFEM) for symmetric second order linear elliptic operators. The method is formulated on nonconforming meshes made of simplices or quadrilaterals, with any polynomial degree and in any dimension ≥ 2. We prove that the ADFEM is a contraction for the sum of the energy error and the scaled error… (More)

- Andrea Bonito, Ricardo H. Nochetto, M. Sebastian Pauletti
- J. Comput. Physics
- 2010

We consider geometric biomembranes governed by an L 2-gradient flow for bending energy subject to area and volume constraints (Helfrich model). We give a concise derivation of a novel vector formulation, based on shape differential calculus, and corresponding discretization via parametric FEM using quadratic isoparametric elements and a semi-implicit Euler… (More)

- Andrea Bonito, Jean-Luc Guermond
- Math. Comput.
- 2011

We propose and analyze an approximation technique for the Maxwell eigenvalue problem using H 1-conforming finite elements. The key idea consists of considering a mixed method controlling the divergence of the electric field in a fractional Sobolev space H −α with α ∈ (1 2 , 1). The method is shown to be convergent and spectrally correct.

- Andrea Bonito, Erik Burman
- SIAM J. Scientific Computing
- 2008

In this paper we consider a finite element discretization of the Oldroyd-B model of viscoelastic flows. The method uses standard continuous polynomial finite element spaces for velocities, pressures and stresses. Inf-sup stability and stability for convection-dominated flows are obtained by adding a term penalizing the jump of the solution gradient over… (More)

- Andrea Bonito, Ronald A. DeVore, Ricardo H. Nochetto
- SIAM J. Numerical Analysis
- 2013

Elliptic partial differential equations (PDEs) with discontinuous diffusion coefficients occur in application domains such as diffusions through porous media, electromagnetic field propagation on heterogeneous media, and diffusion processes on rough surfaces. The standard approach to numerically treating such problems using finite element methods is to… (More)

- Andrea Bonito, Marco Picasso, Manuel Laso
- J. Comput. Physics
- 2006

We present a mixed finite element method for a model of the flow in a Hele-Shaw cell of 2-D fluid droplets surrounded by air driven by surface tension and actuated by an electric field. The application of interest regards a micro-fluidic device called ElectroWetting on Dielectric (EWOD). Our analysis first focuses on the time-discrete (continuous in space)… (More)

- Andrea Bonito, Joseph E. Pasciak
- Math. Comput.
- 2015

We present and study a novel numerical algorithm to approximate the action of T β := L −β where L is a symmetric and positive definite unbounded operator on a Hilbert space H 0. The numerical method is based on a representation formula for T −β in terms of Bochner integrals involving (I + t 2 L) −1 for t ∈ (0, ∞). To develop an approximation to T β , we… (More)

- Andrea Bonito, Philippe Clément, Marco Picasso
- Numerische Mathematik
- 2007

- Andrea Bonito, Ricardo H. Nochetto, M. Sebastian Pauletti
- SIAM J. Numerical Analysis
- 2010

A new paradigm of adaptivity is to execute refinement, coarsening, and smoothing of meshes on manifolds with incomplete information about their geometry and yet preserve position and curvature accuracy. We refer to this collectively as geometrically consistent mesh modification. We discuss the concept of discrete geometric consistency, show the failure of… (More)