Concept

Lubrication

Related publications (88)

Graph Chatbot

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Tribology of surface-grafted polymer brushes

Harm-Anton Klok, Piotr Mocny

Surface-grafted polymer brushes are a very attractive class of boundary lubricants. This article presents an overview of the tribological properties of surface-attached synthetic polymers. After a brief review of some mechanistic considerations and a discu ...

Royal Soc Chemistry2016

Scaling in natural and laboratory earthquakes

Marie Estelle Solange Violay

Laboratory experiments reproducing seismic slip conditions show extreme frictional weakening due to the activation of lubrication processes. Due to a substantial variability in the details of the weakening transient, generalization of experimental results ...

2016

Design of Oil-Free Turbocompressors for a Two-Stage Industrial Heat Pump under Variable Operating Conditions

Jürg Alexander Schiffmann, Adeel Javed

A pair of mechanically driven small-scale turbocompressors running on gas lubricated bearings have been designed for a two-stage heat pump application functioning under variable operating conditions. Novelty in the present two-stage heat pump system lies i ...

2016

NANOTRIBOLOGICAL RESPONSES OF A MOLECULARLY THIN LUBRICANT CONFINED BETWEEN ROUGH SURFACES

Jean-François Molinari, Ramin Aghababaei

Recent innovations and developments in the field of nanotechnology and subsequent advent of miniaturized moving components have led scientists to extensively investigate the atomic-scale origins of friction and lubrication. According to the classical Strib ...

2015

Discontinuous Shear Thickening without Inertia in Dense Non-Brownian Suspensions

Matthieu Wyart

A consensus is emerging that discontinuous shear thickening (DST) in dense suspensions marks a transition from a flow state where particles remain well separated by lubrication layers, to one dominated by frictional contacts. We show here that reasonable a ...

American Physical Society2014

Granulation and bistability in non-Brownian suspensions

Matthieu Wyart

In granulation, a dense colloidal suspension is converted into pasty lumps by application of flow. Often, such lumps are bistable: each can exist either as a fluid droplet (with a shiny surface) or as a jammed granule, whose rough surface creates a bulk st ...

Springer Verlag2014

Avalanche of fluid in the laboratory: the dam-break problem revisited.

Christophe Ancey

The talk reviews some of the analytical results available for studying the dambreak problem. Emphasis is then given to a thorough comparison between experimental data, analytical results (lubrication theory), and numerical simulations (obtained using the s ...

2014

Modelling Plasticity in Nanoscale Contact

Till Junge

The problem of mechanical contact is a truly multiscale one. Atomistic effects that violate continuum theory dominate the deformations of contacting asperities, while the interactions between distant asperities occur through long-range elasticity. This the ...

EPFL2014

Geometry as a Catalyst: How Vapor Cavities Nucleate from Defects

Simone Meloni

The onset of cavitation is strongly enhanced by the presence of rough surfaces or impurities in the liquid. Despite decades of research, the way the geometry of these defects promote the nucleation of bubbles and its effect on the kinetics of the process r ...

Amer Chemical Soc2013

Foil bearing design guidelines for improved stability

Jürg Alexander Schiffmann

Experimental evidence in the literature suggests that foil bearing supported rotors can suffer from sub-synchronous vibration. While dry-friction between top foil and bump foil is thought to provide structural damping, sub-synchronous vibration is still an ...

2012