Roughness Evolution Induced by Third-Body Wear

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We prove global in time well-posedness for perturbations of the 2D stochastic Navier-Stokes equations partial derivative( t)u + u center dot del u = Delta u - del p + sigma + xi, u(0, center dot ) = u(0),div (u) = 0, driven by additive space-time white noi ...

Understanding how things break and slide is of paramount importance to describe the dynamics of a broad range of physical systems. This includes day-to-day problems such as the breaking of a glass of wine or the sliding of skis on snow, but also engineerin ...

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Electromagnetic forces and torques enable many key technologies, including optical tweezers or dielectrophoresis. Interestingly, both techniques rely on the same physical process: the interaction of an oscillating electric field with a particle of matter. ...

When two rough surfaces slide against each other, two main behaviors can be observed at the asperity level: A ductile behavior where the asperities tend to smooth out or a brittle behavior where the asperities detach and form debris. Recently, a critical l ...

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 ...

The use of molecular dynamics (MD) simulations has led to promising results to unravel the atomistic origins of adhesive wear, and in particular for the onset of wear at nanoscale surface asperities. However, MD simulations come with a high computational c ...

Frictional contacts lead to the formation of a surface layer called the third body, consisting of wear particles and structures resulting from their agglomerates. Its behavior and properties at the nanoscale control the macroscopic tribological performance ...

Gas sensing systems and devices based on metal oxides are widely spreading due to their high performance in terms of sensor response and relatively low costs. Despite several experimental studies, as well as molecular simulations, are available in the lite ...

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We develop an analytical model of adhesive wear between two unlubricated rough surfaces, forming micro-contacts under normal load. The model is based on an energy balance and a crack initiation criteria. We apply the model to the problem of self-affine rou ...

Molecular simulations allow to investigate the behaviour of materials at the atomistic level, shedding light on phenomena that cannot be directly observed in experiments. Accurate results can be obtained with ab initio methods, while simulations of large-s ...

When two solids start rubbing together, frictional sliding initiates in the wake of slip fronts propagating along their surfaces in contact. This macroscopic rupture dynamics can be successfully mapped on the elastodynamics of a moving shear crack. However ...

In order to develop predictive wear laws, relevant material parameters and their influence on the wear rate need to be identified. Despite decades of research, there is no agreement on the mathematical form of wear equations and even the simplest models, s ...

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The interaction between neutral particles and the plasma plays a key role in determining the dynamics of the tokamak boundary that, in turn, significantly impact the overall performance of the device. Leveraging the work in Wersal and Ricci [Nucl. Fusion 5 ...

Roughness Evolution Induced by Third-Body Wear

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Global existence for perturbations of the 2D stochastic Navier-Stokes equations with space-time white noise

Friction and fracture: richness and complexity in dynamic rupture

Lattice Green's function method for Atomistic/Continuum coupling

Permeability sets the linear path instability of buoyancy-driven disks

Electromagnetic Forces and Torques: From Dielectrophoresis to Optical Tweezers

Understanding the mechanisms of adhesive wear for heterogeneous materials through atomistic simulations

Modeling the origins of adhesive wear across scales

Adhesive wear with a coarse-grained discrete element model

Effect of wear particles and roughness on nanoscale friction

Modelling electronic transport in monocrystalline metal oxide gas sensors: from the surface kinetics to the experimental response

A mixture model to take into account diluted gas in liquid flow: applications to aluminium electrolysis

Microscale hydrodynamic confinements: shaping liquids across length scales as a toolbox in life sciences

Mass-Zero constrained dynamics and statistics for the shell model in magnetic field

Adhesive wear regimes on rough surfaces and interaction of micro-contacts

Transferable machine-learning models of complex materials: the case of GaAs

Onset of sliding across scales: How the contact topography impacts frictional strength

A parameter-free mechanistic model of the adhesive wear process of rough surfaces in sliding contact

Molecular simulations of interfacial systems: challenges, applications and future perspectives

Structure-Preserving Reduced Basis Methods For Poisson Systems

Self-consistent simulation of multi-component plasma turbulence and neutral dynamics in the tokamak boundary