Publications associées à Laboratory and ALT-Evaluation of high stiffness underlayers with high percentage of re-use as developed in the NR2C- project

Biological fluid dynamics of airborne COVID-19 infection

We review the state of knowledge on the bio-fluid dynamic mechanisms involved in the transmission of the infection from SARS-CoV-2. The relevance of the subject stems from the key role of airborne virus transmission by viral particles released by an infect ...

2020

SESTET: A spatially explicit stream temperature model based on equilibrium temperature

Andrea Rinaldo, Enrico Bertuzzo, Luca Carraro, Marco Toffolon

Stream-water temperature is a key variable controlling chemical, biological, and ecological processes in freshwater environments. Most models focus on a single river cross-section; however, temperature gradients along stretches and tributaries of a river n ...

2020

Gyrokinetic analysis and simulation of pedestals to identify the culprits for energy losses using 'fingerprints'

Patrick Blanchard, Basil Duval, Ambrogio Fasoli, Yves Martin, Richard Pitts, Olivier Sauter, Henri Weisen, Stefano Coda, Marco Wischmeier, Jan Horacek, Yann Camenen, Jonathan Graves, Duccio Testa, Mikhail Maslov, Javier García Hernández, David Pfefferlé, Dalziel Joseph Wilson, Jonathan Marc Philippe Faustin, Federico Nespoli, Hamish William Patten, Nicola Vianello, Antonio José Pereira de Figueiredo, Samuel Lanthaler, Liang Yao, Cristian Sommariva, Davide Galassi, Alessandro Pau, Yao Zhou, Otto Asunta, Bernhard Sieglin

Fusion performance in tokamaks hinges critically on the efficacy of the edge transport barrier (ETB) in suppressing energy losses. The new concept of 'fingerprints' is introduced to identify the instabilities that cause transport losses in the ETBs of many ...

IOP Publishing Ltd2019

Alpine glacier-fed turbid lakes are discontinuous cold polymictic rather than dimictic

Hannes Markus Peter

Glacier retreat as a consequence of climate change influences freshwater ecosystems in manifold ways, yet the physical and chemical bases of these effects are poorly studied. Here, we characterize how water temperature differs between alpine lakes with and ...

Freshwater Biological Assoc2017

Understanding the mixing process in 3D microfluidic nozzle/diffuser systems: simulations and experiments

Abdeljalil Sayah, Martinus Gijs

We characterise computationally and experimentally a three-dimensional (3D) microfluidic passive mixer for various Reynolds numbers ranging from 1 to 100, corresponding to primary flow rates of 10-870 mu l min(-1). The 3D mixing channel is composed of mult ...

Iop Publishing Ltd2016

Multiscale imaging and characterization of the effect of mixing temperature on asphalt concrete containing recycled components

Sara Bressi, Manfred Partl

When producing asphalt concrete mixture with high amounts of reclaimed asphalt pavement (RAP), the mixing temperature plays a significant role in the resulting spatial distribution of the components as well as on the quality of the resulting mixture, in te ...

Wiley-Blackwell2016

Asphalt Mixture with RAP: Mix Design Optimization

André-Gilles Dumont, Michel Pittet, Nicolas Bueche, Sara Bressi

The addition of reclaimed asphalt pavement (RAP) in hot mix asphalt is now common practice in Switzerland. With the increases of RAP content in asphalt mixture, the problematic of the mix design optimization becomes an important issue to be considered. The ...

Springer2016

A new laboratory methodology for optimization of mixture design of asphalt concrete containing reclaimed asphalt pavement material

André-Gilles Dumont, Sara Bressi, Manfred Partl

The reduction of virgin bitumen added to asphalt mixtures containing Reclaimed Asphalt Pavement (RAP) is based on the typical assumption that all the aged binder function in the same way as the virgin binder. However, recent studies conducted by the author ...

Springer Verlag2016

Advanced methodology for optimization of mixture design of asphalt concrete containing reclaimed asphalt pavement material

Sara Bressi

Despite the massive use of Reclaimed Asphalt Pavement (RAP) in Hot Mix Asphalt (HMA) production, the chemo-physical phenomena that characterise the fabrication of these mixtures have not yet been completely explored. The detection and understanding of thes ...

EPFL2016

Cluster phenomenon and partial differential aging in RAP mixtures

André-Gilles Dumont, Michel Pittet, Sara Bressi

The present study defines a procedure for gaining a better understanding of the interaction between the aged and the virgin binders and what actually occurs during a mix process. Indeed, the authors propose a methodology to determine and quantify the clust ...

Elsevier Sci Ltd2015

Particle clustering phenomena in hot asphalt mixtures with high content of reclaimed asphalt pavements

André-Gilles Dumont, Sara Bressi, Manfred Partl

One challenge in efficient recycling of asphalt concrete is the adherence of the reclaimed asphalt pavement (RAP) particles or clustering that inhibits fulfilling the aggregate gradation requirements. In order to investigate this phenomenon two types of mi ...

Elsevier Sci Ltd2015

A charge carrier transport model for donor-acceptor blend layers

Wolfgang Richard Tress

Highly efficient organic solar cells typically comprise donor-acceptor blend layers facilitating effective splitting of excitons. However, the charge carrier mobility in the blends can be substantially smaller than in neat materials, hampering the device p ...

American Institute of Physics2015

Ground temperature modelling: The case study of Rue des Maraîchers in Geneva

Jean-Louis Scartezzini, Jérôme Henri Kämpf, Govinda Upadhyay

This paper presents a methodology to approximate the urban heat island effect by using a PostgreSQL database and CitySim software, a simulation tool to evaluate urban energy flows. A ground temperature model has been developed for shallow depths (until 4m) ...

EuroGraphics Digital Library2014

Reaction kinetics of dolomite and portlandite

Karen Scrivener, Xinyu Zhang

The reactions of dolomite with portlandite have been studied at well-spaced temperatures between 20 degrees C and 85 degrees C using XRD Rietveld, TG and SEM methods. The results show quantitatively the faster rates of reaction at higher temperature. Isoth ...

Pergamon-Elsevier Science Ltd2014

Heat Management for Process Intensification of Fast Exothermic Reactions in Microstructured Reactors

Julien Haber

Nowadays, the production in fine chemical and pharmaceutical industry is mostly carried out in large scale batch reactors having typically dimensions of a few meters to satisfy the demand of the market. Even though this technology has been widely used and ...

EPFL2013

Single Active Nanoelectromechanical Tuning Fork Front-End Radio-Frequency Receiver

Mihai Adrian Ionescu, Alexandru Rusu, Sebastian Thimotee Bartsch

Nanoelectromechanical systems (NEMS) offer the potential to revolutionize fundamental methods employed for signal processing in today's telecommunication systems,1-4 owing to their spectral purity and the prospect of integration with existing technology. I ...

Institute of Physics2012

Effects of wave forcing on a subterranean estuary

David Andrew Barry, Clare Robinson, Roham Bakhtyar

Wave and tide are important forcing factors that typically co-exist in coastal environments. A numerical study was conducted to investigate individual and combined effects of these forces on flow and mixing processes in a near-shore subterranean estuary. A ...

American Geophysical Union2010

ALT-evaluation of high stiffness base layers with high percentages of reclaimed asphalt

Nicolas Bueche

New Road Construction Concepts (NR2C) is a FEHRL-project supported by the European Commission under the Sixth Framework Programme. NR2C develops perspectives and specific innovations, so that long-term visions are linked to short-term action. One of the id ...

2008

High stiffness underlayers with high percentage of re- use as developed in the NR2C-project

Nicolas Bueche

New Road Construction Concepts (NR2C) is a FEHRL- project supported by the European Commission under the Sixth Framework Programme. NR2C aims at developing perspectives and specific innovations in different areas. One of the ideas concerns the development ...

EMPA2008

Elasto-viscoplastic modeling of flexible pavement

André-Gilles Dumont

This communication concerns analysis of the behavior of flexible pavements using an elastic-viscoplastic constitutive relation for the asphalt concrete. The numerical model takes into consideration the influence of the temperature on the behavior of the as ...

2007