Concept
Lubrication
Related publications (88)
Computational fluid dynamics simulations of the heat transfer properties of graphene-based nanolubricants and application to hydrodynamic lubrication
In this paper, we consider experimental data available for graphene-based nanolubricants to evaluate their convective heat transfer performance by means of computational fluid dynamics (CFD) simulations. Single-phase models with temperature-dependent prope ...
Aip Publishing2024Fault roughness controls injection-induced seismicity
Surface roughness ubiquitously prevails in natural faults across various length scales. Despite extensive studies highlighting the important role of fault geometry in the dynamics of tectonic earthquakes, whether and how fault roughness affects fluid-induc ...
Washington2024Influence of Viscous Lubricant on Nucleation and Propagation of Frictional Ruptures
Marie Estelle Solange Violay, François Xavier Thibault Passelègue, Federica Paglialunga
Fluids are pervasive in the Earth's crust and saturate fractures and faults. The combination of fluids and gouge layers developing along faults can generate fluids of different viscosities. Such viscous fluids were found to influence the reactivation, fric ...
AMER GEOPHYSICAL UNION2023Modeling of rough contact interfaces with trapped compressive liquid pockets
Jean-François Molinari, Guillaume Anciaux, Parissasadat Alavi, Julie Richard, Loris Rocchi
Boundary and mixed lubrication are usually used to reduce friction in sheet metal form- ing. In the boundary lubrication regime load is mainly carried by contacting asperities. Therefore, the tribological problem can be solved in the dry case using a geome ...
2023Thermal management for gas lubricated, high-speed turbomachinery
Jürg Alexander Schiffmann, Luis Eric Olmedo Ocampo, Wei Liu
High-speed turbomachinery is commonly designed to achieve high power densities. Limited space for active cooling results in a challenging thermal management. A thermal modeling approach leveraging modern declarative programming capabilities is presented, y ...
2023Modeling the origins of adhesive wear across scales
Friction and wear occur at every interface between solid materials.In the design of mechanical devices, it is desirable to be able to quantify and control the amount of friction and wear, as well as predict their evolution with time. ``Tribology'' is the s ...
EPFL2022The Role of Geometrical Parameters in the Lubrication of the Swiss Lever Escapement
The lubrication regimes of a contact pair escapement-ruby pallet of a Swiss lever escapement have been investigated combining the theory of fluid lubrication with a well-established kinematic and inverse dynamic multibody model. The kinematic analytical re ...
2021A Simple Mechanistic Model for Friction of Rough Partially Lubricated Surfaces
Jean-François Molinari, Tobias Brink, Gianluca Costagliola, Julie Richard
We report experimental measurements of friction between an aluminum alloy sliding over steel with various lubricant densities. Using the topography scans of the surfaces as input, we calculate the real contact area using the boundary element method and the ...
2021BEM Study of the Contact between Rough Surfaces for Dry and Lubricated Condition
Friction is one of the most important topics in contact mechanics and the real contact area plays a significant role in determining the emergent friction properties. We study the detachment of the original contact clusters during the surface sliding. The e ...
2021Experimental Investigation of a Small-Scale Organic Rankine Cycle Turbo-Generator Supported on Gas-Lubricated Bearings
Jürg Alexander Schiffmann, Kévin Rosset
Waste heat recovery (WHR) is expected to contribute to reducing CO2 emissions from trucks. Organic Rankine cycle (ORC) systems show the highest potential for this application, but still lack efficient small-scale expansion devices, in practice. A novel tur ...
2021