Ulrich Razafison

Reliable Fast Frequency Sweep for Microwave Devices via the Reduced Basis Method (2009)

De La Rubia, Valentin, Razafison, Ulrich, Maday, Yvon

In this paper, a reduced basis approximation-based model order reduction for fast and reliable sweep in time-harmonic Maxwell's equations is detailed. Contrary to what one may expect by observing the...

Reliable Fast Frequency Sweep for Microwave Devices via the Reduced Basis Method (2009)

De La Rubia, Valentin, Razafison, Ulrich, Maday, Yvon

In this paper, a reduced basis approximation-based model order reduction for fast and reliable sweep in time-harmonic Maxwell's equations is detailed. Contrary to what one may expect by observing the...

A shallow water model for the numerical simulation of overland flow on surfaces with ridges and furrows (2009)

Razafison, Ulrich, Cordier, Stephane, Delestre, Olivier, Darboux, Frédéric, Lucas, Carine, James, Francois

We introduce here a shallow water model for the numerical simulation of overland flow with furrows effects without representing them explicitly. The model is obtained by adding to the classical...

A shallow water model for the numerical simulation of overland flow on surfaces with ridges and furrows (2009)

Razafison, Ulrich, Cordier, Stephane, Delestre, Olivier, Darboux, Frédéric, Lucas, Carine, James, Francois

We introduce here a shallow water model for the numerical simulation of overland flow with furrows effects without representing them explicitly. The model is obtained by adding to the classical...

Reliable Fast Frequency Sweep for Microwave Devices via the Reduced Basis Method (2009)

De La Rubia, Valentin, Razafison, Ulrich, Maday, Yvon

In this paper, a reduced basis approximation-based model order reduction for fast and reliable sweep in time-harmonic Maxwell's equations is detailed. Contrary to what one may expect by observing the...

Reliable Fast Frequency Sweep for Microwave Devices via the Reduced Basis Method (2009)

De La Rubia, Valentin, Razafison, Ulrich, Maday, Yvon

In this paper, a reduced basis approximation-based model order reduction for fast and reliable sweep in time-harmonic Maxwell's equations is detailed. Contrary to what one may expect by observing the...

A shallow water model for the numerical simulation of overland flow on surfaces with ridges and furrows (2009)

Razafison, Ulrich, Cordier, Stephane, Delestre, Olivier, Darboux, Frédéric, Lucas, Carine, James, Francois

We introduce here a shallow water model for the numerical simulation of overland flow with furrows effects without representing them explicitly. The model is obtained by adding to the classical...

Reliable Fast Frequency Sweep for Microwave Devices via the Reduced Basis Method (2009)

De La Rubia, Valentin, Razafison, Ulrich, Maday, Yvon

In this paper, a reduced basis approximation-based model order reduction for fast and reliable sweep in time-harmonic Maxwell's equations is detailed. Contrary to what one may expect by observing the...

A shallow water model for the numerical simulation of overland flow on surfaces with ridges and furrows (2009)

Razafison, Ulrich, Cordier, Stephane, Delestre, Olivier, Darboux, Frédéric, Lucas, Carine, James, Francois

We introduce here a shallow water model for the numerical simulation of overland flow with furrows effects without representing them explicitly. The model is obtained by adding to the classical...

On the three dimensional Riesz and Oseen potentials (2008)

Amrouche, Chérif, Bouzit, Hamid, Razafison, Ulrich

We prove continuity properties for Riesz and Oseen potentials. As a consequence, we show some new properties on solutions of Poisson's and Oseen equations. The study relies on weighted Sobolev spaces...

On the three dimensional Riesz and Oseen potentials (2008)

Amrouche, Chérif, Bouzit, Hamid, Razafison, Ulrich

We prove continuity properties for Riesz and Oseen potentials. As a consequence, we show some new properties on solutions of Poisson's and Oseen equations. The study relies on weighted Sobolev spaces...

The stationary Navier-Stokes equations in 3D exterior domains. An approach in anisotropic weighted L^q spaces (2008)

Razafison, Ulrich

We consider the three-dimensional exterior problem for stationary Navier-Stokes equations. We prove, under assumptions of smallness of the data, existence and uniqueness of solutions. By setting the...

The stationary Navier-Stokes equations in 3D exterior domains. An approach in anisotropic weighted L^q spaces (2008)

Razafison, Ulrich

We consider the three-dimensional exterior problem for stationary Navier-Stokes equations. We prove, under assumptions of smallness of the data, existence and uniqueness of solutions. By setting the...

Une borne inférieure pour la constante de la condition inf-sup sur l'opérateur de divergence (2008)

Del Pino, Stéphane, Razafison, Ulrich, Yakoubi, Driss

The inf-sup condition plays an important role in problems from fluid mechanics. The purpose of this Note is to propose, for any connected open set with a Lipschitz-continuous boundary, a new lower...

Une borne inférieure pour la constante de la condition inf-sup sur l'opérateur de divergence (2008)

Del Pino, Stéphane, Razafison, Ulrich, Yakoubi, Driss

The inf-sup condition plays an important role in problems from fluid mechanics. The purpose of this Note is to propose, for any connected open set with a Lipschitz-continuous boundary, a new lower...

Abstract A reduced basis method applied to the Restricted Hartree-Fock equations (2008)

Yvon Maday, Ulrich Razafison

In this Note, we describe a reduced basis approximation method for the computation of some electronic structure in quantum chemistry, based on the Restricted Hartree-Fock equations. Numerical results...

Une borne inférieure pour la constante de la condition inf-sup sur l'opérateur de divergence (2008)

Del Pino, Stéphane, Razafison, Ulrich, Yakoubi, Driss

The inf-sup condition plays an important role in problems from fluid mechanics. The purpose of this Note is to propose, for any connected open set with a Lipschitz-continuous boundary, a new lower...

The stationary Navier-Stokes equations in 3D exterior domains. An approach in anisotropic weighted L^q spaces (2008)

Razafison, Ulrich

We consider the three-dimensional exterior problem for stationary Navier-Stokes equations. We prove, under assumptions of smallness of the data, existence and uniqueness of solutions. By setting the...

Une borne inférieure pour la constante de la condition inf-sup sur l'opérateur de divergence (2008)

Del Pino, Stéphane, Razafison, Ulrich, Yakoubi, Driss

The inf-sup condition plays an important role in problems from fluid mechanics. The purpose of this Note is to propose, for any connected open set with a Lipschitz-continuous boundary, a new lower...

The stationary Navier-Stokes equations in 3D exterior domains. An approach in anisotropic weighted L^q spaces (2008)

Razafison, Ulrich

We consider the three-dimensional exterior problem for stationary Navier-Stokes equations. We prove, under assumptions of smallness of the data, existence and uniqueness of solutions. By setting the...

Isotropically and Anisotropically Weighted Sobolev Spaces for the Oseen Equation (2008)

Amrouche, Chérif, Razafison, Ulrich

This contribution is devoted to the Oseen equations, a linearized form of the Navier-Stokes equations. We give here some results concerning the scalar Oseen operator and we prove Hardy inequalities...

Isotropically and Anisotropically Weighted Sobolev Spaces for the Oseen Equation (2008)

Amrouche, Chérif, Razafison, Ulrich

This contribution is devoted to the Oseen equations, a linearized form of the Navier-Stokes equations. We give here some results concerning the scalar Oseen operator and we prove Hardy inequalities...

On the three dimensional Riesz and Oseen potentials (2008)

Amrouche, Chérif, Bouzit, Hamid, Razafison, Ulrich

We prove continuity properties for Riesz and Oseen potentials. As a consequence, we show some new properties on solutions of Poisson's and Oseen equations. The study relies on weighted Sobolev spaces...

On the three dimensional Riesz and Oseen potentials (2008)

Amrouche, Chérif, Bouzit, Hamid, Razafison, Ulrich

We prove continuity properties for Riesz and Oseen potentials. As a consequence, we show some new properties on solutions of Poisson's and Oseen equations. The study relies on weighted Sobolev spaces...

The stationary Navier-Stokes equations in 3D exterior domains. An approach in anisotropic weighted L^q spaces (2008)

Razafison, Ulrich

We consider the three-dimensional exterior problem for stationary Navier-Stokes equations. We prove, under assumptions of smallness of the data, existence and uniqueness of solutions. By setting the...

Une borne inférieure pour la constante de la condition inf-sup sur l'opérateur de divergence (2008)

Del Pino, Stéphane, Razafison, Ulrich, Yakoubi, Driss

The inf-sup condition plays an important role in problems from fluid mechanics. The purpose of this Note is to propose, for any connected open set with a Lipschitz-continuous boundary, a new lower...

On the three dimensional Riesz and Oseen potentials (2008)

Amrouche, Chérif, Bouzit, Hamid, Razafison, Ulrich

We prove continuity properties for Riesz and Oseen potentials. As a consequence, we show some new properties on solutions of Poisson's and Oseen equations. The study relies on weighted Sobolev spaces...

Isotropically and Anisotropically Weighted Sobolev Spaces for the Oseen Equation (2008)

Amrouche, Chérif, Razafison, Ulrich

This contribution is devoted to the Oseen equations, a linearized form of the Navier-Stokes equations. We give here some results concerning the scalar Oseen operator and we prove Hardy inequalities...

Isotropically and Anisotropically Weighted Sobolev Spaces for the Oseen Equation (2008)

Amrouche, Chérif, Razafison, Ulrich

This contribution is devoted to the Oseen equations, a linearized form of the Navier-Stokes equations. We give here some results concerning the scalar Oseen operator and we prove Hardy inequalities...

Isotropically and Anisotropically Weighted Sobolev Spaces for the Oseen Equation (2008)

Amrouche, Chérif, Razafison, Ulrich

This contribution is devoted to the Oseen equations, a linearized form of the Navier-Stokes equations. We give here some results concerning the scalar Oseen operator and we prove Hardy inequalities...