Publications related to Fick's laws of diffusion

Regimes of classical transport of cold gases in a two-dimensional anisotropic disorder

We numerically study the dynamics of cold atoms in a two-dimensional disordered potential. We consider an anisotropic speckle potential and focus on the classical dynamics, which is relevant to some recent experiments. Firstly, we study the behavior of par ...

Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft2011

Numerical Simulation and Optimization of the Alumina Distribution in an Aluminium Electrolysis Pot

Thomas Hofer

This thesis is about the numerical simulation and optimization of the alumina repartition in the bath of an aluminium electrolysis pot. A mathematical model is set up which contains the feeding of alumina particles to the bath, the dissolution of the parti ...

EPFL2011

Multi-component particle size segregation in shallow granular avalanches

Christophe Ancey

A general continuum theory for particle size segregation and diffusive remixing in polydisperse granular avalanches is formulated using mixture theory. Comparisons are drawn to existing segregation theories for bi-disperse mixtures and the case of a ternar ...

Cambridge University Press2011

Decomposition, diffusion, and growth rate anisotropies in self-limited profiles during metalorganic vapor-phase epitaxy of seeded nanostructures

Elyahou Kapon, Alok Rudra, Klaus Leifer

We present a model for the interplay between the fundamental phenomena responsible for the formation of nanostructures by metalorganic vapor phase epitaxy on patterned (001)/(111)B GaAs substrates. Experiments have demonstrated that V-groove quantum wires ...

2011

Non-Linear Gyrokinetic Simulations of Microturbulence in TCV Electron Internal Transport Barriers

Olivier Sauter, Laurent Villard, Stephan Brunner, Emiliano Fable, Xavier Lapillonne

Using the local (flux-tube) version of the Eulerian code GENE (Jenko et al 2000 Phys. Plasmas 7 1904), gyrokinetic simulations of microturbulence were carried out considering parameters relevant to electron-internal transport barriers (e-ITBs) in the TCV t ...

IOP Publishing2011

Non-linear gyrokinetic simulations of microturbulence in TCV electron internal transport barriers

Olivier Sauter, Laurent Villard, Stephan Brunner, Emiliano Fable, Xavier Lapillonne

Using the local (flux-tube) version of the Eulerian code GENE (Jenko et al 2000 Phys. Plasmas 7 1904), gyrokinetic simulations of microturbulence were carried out considering parameters relevant to electron-internal transport barriers (e-ITBs) in the TCV t ...

2011

First-Principles Study of the High-Temperature Phase of Li

Michele Ceriotti, Giacomo Francesco Leonardo Miceli, Michele Parrinello

On the basis of ab initio molecular dynamics simulations, we propose that the Fm3̄m symmetry of the high-temperature (above 356 K) phase of Li 2NH results from dynamical disorder due to fast diffusion of Li interstitials and a slower diffusion of Li vacanc ...

2011

Improvement of the one-dimensional dissolved-solute convection equation using the QUICKEST-ULTIMATE algorithm

Rakesh Chawla, Davide Bertolotto

The U.S.-NRC best-estimate system code TRACE adopts a finite volumes, first-order upwind discretization scheme to solve the dissolved-solute convection equation. Such a scheme is known to strongly suffer from numerical diffusion, which can be a significant ...

Elsevier2011

Three-dimensional equilibria and transport in RFX-mod: A description using stellarator tools

Wilfred Anthony Cooper

RFX-mod self-organized single helical axis (SHAx) states provide a unique opportunity to advance 3D fusion physics and establish a common knowledge basis in a parameter region not covered by stellarators and tokamaks. The VMEC code has been adapted to the ...

2011

Audio-driven Nonlinear Video Diffusion

Pierre Vandergheynst, Anna Llagostera Casanovas

In this paper we present a novel nonlinear video diffusion approach based on the fusion of information in audio and video channels. Both modalities are efficiently combined into a diffusion coefficient that integrates the basic assumption in this domain, i ...

Institute of Electrical and Electronics Engineers2011

Fick's laws of diffusion

Regimes of classical transport of cold gases in a two-dimensional anisotropic disorder

Numerical Simulation and Optimization of the Alumina Distribution in an Aluminium Electrolysis Pot

Multi-component particle size segregation in shallow granular avalanches

Decomposition, diffusion, and growth rate anisotropies in self-limited profiles during metalorganic vapor-phase epitaxy of seeded nanostructures

Non-Linear Gyrokinetic Simulations of Microturbulence in TCV Electron Internal Transport Barriers

Non-linear gyrokinetic simulations of microturbulence in TCV electron internal transport barriers

First-Principles Study of the High-Temperature Phase of Li

Improvement of the one-dimensional dissolved-solute convection equation using the QUICKEST-ULTIMATE algorithm

Three-dimensional equilibria and transport in RFX-mod: A description using stellarator tools

Audio-driven Nonlinear Video Diffusion

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Numerical Simulation and Optimization of the Alumina Distribution in an Aluminium Electrolysis Pot

Decomposition, diffusion, and growth rate anisotropies in self-limited profiles during metalorganic vapor-phase epitaxy of seeded nanostructures

Multi-component particle size segregation in shallow granular avalanches

Regimes of classical transport of cold gases in a two-dimensional anisotropic disorder

Audio-driven Nonlinear Video Diffusion

Improvement of the one-dimensional dissolved-solute convection equation using the QUICKEST-ULTIMATE algorithm

Non-Linear Gyrokinetic Simulations of Microturbulence in TCV Electron Internal Transport Barriers

Non-linear gyrokinetic simulations of microturbulence in TCV electron internal transport barriers

First-Principles Study of the High-Temperature Phase of Li

Three-dimensional equilibria and transport in RFX-mod: A description using stellarator tools