Publications related to Equilibrium and Space-Charge Wave Analysis of Electron-Beams in Conducting and Absorbing Gyrotron Beam Tunnels

Two-fluid solutions for Langmuir probes in collisionless and isothermal plasma, over all space and bias potential

Ivo Furno, Alan Howling, Philippe Frédérique Bruno Guittienne

This paper presents solutions for the classical one-dimensional (1D radial and Cartesian) problem of Langmuir probes in a collisionless, isothermal plasma. The method is based on two-fluid equations derived from the first two moments of Vlasov's equation. ...

2018

Model for the erosion onset of a granular bed sheared by a viscous fluid

Matthieu Wyart

We study theoretically the erosion threshold of a granular bed forced by a viscous fluid. We first introduce a model of interacting particles driven on a rough substrate. It predicts a continuous transition at some threshold forcing theta(c), beyond which ...

Amer Physical Soc2016

Parallel Algorithms for the Solution of Large-Scale Fluid-Structure Interaction Problems in Hemodynamics

Davide Forti

This thesis addresses the development and implementation of efficient and parallel algorithms for the numerical simulation of Fluid-Structure Interaction (FSI) problems in hemodynamics. Indeed, hemodynamic conditions in large arteries are significantly aff ...

EPFL2016

Novel linear analysis for a gyrotron oscillator based on a spectral approach

Stefano Alberti, Minh Quang Tran, Jean-Philippe Hogge, Jérémy Genoud, Trach-Minh Tran

With the aim of gaining a better physical insight into linear regimes in gyrotrons, a new linear model was developed. This model is based on a spectral approach for solving the self-consistent system of equations describing the wave-particle interaction in ...

2016

A mathematical and numerical framework for ultrasonically-induced Lorentz force electrical impedance tomography

Pierre Robert Maurice Millien

We provide a mathematical analysis and a numerical framework for Lorentz force electrical conductivity imaging. Ultrasonic vibration of a tissue in the presence of a static magnetic field induces an electrical current by the Lorentz force. This current can ...

Elsevier2015

Multiscale homogenization for fluid and drug transport in vascularized malignant tissues

Alfio Quarteroni

A system of differential equations for coupled fluid and drug transport in vascularized (malignant) tissues is derived by a multiscale expansion. We start from mass and momentum balance equations, stated in the physical domain, geometrically characterized ...

World Scientific Publishing2015

Electrical Neuroimaging with Irrotational Sources

This paper discusses theoretical aspects of the modeling of the sources of the EEG (i.e., the bioelectromagnetic inverse problem or source localization problem). Using theHelmholtz decomposition (HD) of the current density vector (CDV) of the primary curre ...

Hindawi Publishing Corporation2015

Exotic blow up solutions for the $\Box u^5$-focussing wave equation in $\mathbb{R}^3$

Joachim Krieger, Roland Donninger, Min Huang

For the critical focusing wave equation

\Box u = u^5

on

\mathbb{R}^{3+1}

in the radial case, we construct a family of blowup solutions which are obtained from the stationary solutions

W(r)

by means of a dynamical rescaling $\lambda(t)\frac{1}{2}W(\la ...

Michigan Mathematical Journal2014

Tokamak coordinate conventions: COCOS

Olivier Sauter

Dealing with electromagnetic fields, in particular current and related magnetic fields, yields "natural" physical vector relations in 3-D. However, when it comes to choosing local coordinate systems, the "usual" right-handed systems are not necessarily the ...

Elsevier Science Bv2013

Gyre formation within embayments of a large lake (Lake Geneva, Switzerland)

David Andrew Barry, Alfred Johny Wüest, Ulrich Lemmin, Damien Bouffard, Amir Mehdi Razmi, Nicolas Le Dantec

Numerical simulations were carried out to examine gyre formation within open, wide lacustrine embayments. The present study was motivated by observed differences in gyre formation within two open and wide embayments (located at Vidy and Morges in Lake Gene ...

2013

Equilibrium and Space-Charge Wave Analysis of Electron-Beams in Conducting and Absorbing Gyrotron Beam Tunnels

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Two-fluid solutions for Langmuir probes in collisionless and isothermal plasma, over all space and bias potential

Model for the erosion onset of a granular bed sheared by a viscous fluid

Parallel Algorithms for the Solution of Large-Scale Fluid-Structure Interaction Problems in Hemodynamics

Novel linear analysis for a gyrotron oscillator based on a spectral approach

A mathematical and numerical framework for ultrasonically-induced Lorentz force electrical impedance tomography

Multiscale homogenization for fluid and drug transport in vascularized malignant tissues

Electrical Neuroimaging with Irrotational Sources

Exotic blow up solutions for the $\Box u^5$-focussing wave equation in $\mathbb{R}^3$

Tokamak coordinate conventions: COCOS

Gyre formation within embayments of a large lake (Lake Geneva, Switzerland)

Model for the erosion onset of a granular bed sheared by a viscous fluid

Parallel Algorithms for the Solution of Large-Scale Fluid-Structure Interaction Problems in Hemodynamics

A mathematical and numerical framework for ultrasonically-induced Lorentz force electrical impedance tomography

Tokamak coordinate conventions: COCOS

Electrical Neuroimaging with Irrotational Sources

Two-fluid solutions for Langmuir probes in collisionless and isothermal plasma, over all space and bias potential

Exotic blow up solutions for the $\Box u^5$-focussing wave equation in $\mathbb{R}^3$

Gyre formation within embayments of a large lake (Lake Geneva, Switzerland)

Novel linear analysis for a gyrotron oscillator based on a spectral approach

Multiscale homogenization for fluid and drug transport in vascularized malignant tissues