Concept
Centre de poussée
Publications associées (41)
Determination of Parameters Characteristic of Dynamic Weakening Mechanisms During Seismic Faulting in Cohesive Rocks
Marie Estelle Solange Violay, François Xavier Thibault Passelègue, Chiara Cornelio
While sliding at seismic slip-rates of ∼1 m/s, natural faults undergo an abrupt decrease of shear stress called dynamic weakening. Asperity-scale processes related to flash heating and weakening and, meso-scale (mm-cm) processes involving shear across the ...
AGU2022Steadily Moving Semi-Infinite Hydraulic Fracture in a Poroelastic Media
Brice Tanguy Alphonse Lecampion, Andreas Möri
Linear elastic fracture mechanics has been widely used to describe the propagation of hydraulic fractures in rocks [1]. The embedding material is generally considered to be elastic and permeable, but the fluid exchange between the fracture and the media is ...
2022From coating flow patterns to porous body wake dynamics via multiscale models
Multiscale phenomena are involved in countless problems in fluid mechanics. Coating flows are known to exhibit a broad variety of patterns, such as wine tears in a glass and dripping of fresh paint applied on a wall. Coating flows are typically modeled und ...
EPFL2022On predicting pore fluid pressure changes in unsaturated porous media subject to undrained processes
Lyesse Laloui, Alessio Ferrari, Angelica Tuttolomondo
Predicting the induced change of fluid pressure in an unsaturated porous medium during undrained loading/unloading processes is challenging because two different fluids (a liquid and a gaseous solution) and a mixture of solid particles are involved. The re ...
2021Hydro-mechanical coupling in porous rocks: hidden dependences to the microstructure?
While hydro-mechanical coupling in rocks is generally well understood, exotic rock poroelastic responses-such as unexpected dependence to fluid diffusion time and low skeleton moduli-have been reported. Hydro-mechanical coupling, or poroelasticity, explain ...
OXFORD UNIV PRESS2021Three-dimensional fluid-driven stable frictional ruptures
Brice Tanguy Alphonse Lecampion, Alexis Alejandro Sáez Uribe
We investigate the quasi-static growth of a fluid-driven frictional shear crack that propagates in mixed mode (II+III) on a planar fault interface that separates two identical half-spaces of a three-dimensional solid. The fault interface is characterized b ...
2021Benchmark study of undrained triaxial testing of Opalinus Clay shale: Results and implications for robust testing
Lyesse Laloui, Alessio Ferrari, Alberto Minardi
Triaxial testing of argillaceous rocks and shales is significantly more challenging than conventional rock mechanical testing. The challenges are mainly related to the very low permeability of these geomaterials, and their sensitivity to exposure of atmosp ...
ELSEVIER2021Hydraulic fracture growth in quasi-brittle materials
Hydraulic fracturing is a technique often used in the oil and gas industry to enhance the production of wells in low-permeability reservoirs. It consists of fluid injection at a sufficiently large injection rate to create and propagate tensile fractures in ...
EPFL2021Single-phase SPH modelling of plunge pool dynamic pressures at a near-prototype scale
The turbulent plunging jet of a nearly incompressible fluid into a stagnant fluid is of great importance in many practical applications, especially for the engineering of hydropower. As an example, the dynamic load exerted by the impact of turbulent high-v ...
TAYLOR & FRANCIS LTD2021The dynamics and timescales of static stall
Karen Ann J Mulleners, Sébastien Le Fouest, Julien Dominique Claude Deparday
Airfoil stall plays a central role in the design of safe and efficient lifting surfaces. We typically distinguish between static and dynamic stall based on the unsteady rate of change of an airfoil’s angle of attack. Despite the somewhat misleading denotat ...
2021