Concept
Viscous stress tensor
Publications associées (155)
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We consider on the torus the scaling limit of stochastic 2D (inviscid) fluid dynamics equations with transport noise to deterministic viscous equations. Quantitative estimates on the convergence rates are provided by combining analytic and probabilistic ar ...
Academic Press Inc Elsevier Science2024Stability of a liquid layer draining around a horizontal cylinder: Interplay of capillary and gravity forces
François Gallaire, Shahab Eghbali, Simeon Vladimirov Djambov
We study the drainage of a viscous liquid film coating the outside of a solid horizontal cylinder, where gravity acts vertically. We focus on the limit of large Ohnesorge numbers Oh, where inertia is negligible compared to viscous effects. We first study t ...
Amer Physical Soc2024Reduced order modeling of parametrized pulsatile blood flows: Hematocrit percentage and heart rate
This paper numerically evaluates the accuracy and performance of a stabilized finite element Reduced Order Modelling (ROM) approach that is designed to simulate pulsatile blood flows. The method is able to estimate fluid flow parametric solutions of intere ...
PERGAMON-ELSEVIER SCIENCE LTD2023Solids that are also liquids: elastic tensors of superionic materials
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Superionics are fascinating materials displaying both solid- and liquid-like characteristics: as solids, they respond elastically to shear stress; as liquids, they display fast-ion diffusion at normal conditions. In addition to such scientific interest, su ...
NATURE PORTFOLIO2023Three-dimensional buoyant hydraulic fractures: finite volume release
Brice Tanguy Alphonse Lecampion, Andreas Möri
In impermeable media, a hydraulic fracture can continue to expand even without additional fluid injection if its volume exceeds the limiting volume of a hydrostatically loaded radial fracture. This limit depends on the mechanical properties of the surround ...
2023Influence 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 UNION2023Permeability sets the linear path instability of buoyancy-driven disks
François Gallaire, Pier Giuseppe Ledda, Giuseppe Antonio Zampogna, Giovanni Vagnoli
The prediction of trajectories of buoyancy-driven objects immersed in a viscous fluid is a key problem in fluid dynamics. Simple-shaped objects, such as disks, present a great variety of trajectories, ranging from zig-zag to tumbling and chaotic motions. Y ...
CAMBRIDGE UNIV PRESS2023Fiber Buckling in Confined Viscous Flows: An Absolute Instability Described by the Linear Ginzburg-Landau Equation
François Gallaire, Jean Cappello
We explore the dynamics of a flexible fiber transported by a viscous flow in a Hele-Shaw cell of height comparable to the fiber height. We show that long fibers aligned with the flow experience a buckling instability. Competition between viscous and elasti ...
AMER PHYSICAL SOC2022Fourier Collocation and Reduced Basis Methods for Fast Modeling of Compressible Flows
Jan Sickmann Hesthaven, Deep Ray
A projection-based reduced order model (ROM) based on the Fourier collocation method is proposed for compressible flows. The incorporation of localized artificial viscosity model and filtering is pursued to enhance the robustness and accuracy of the ROM fo ...
GLOBAL SCIENCE PRESS2022Friction Induces Anisotropic Propulsion in Sliding Magnetic Microtriangles
In viscous fluids, motile microentities such as bacteria or artificial swimmers often display different transport modes than macroscopic ones. A current challenge in the field aims at using friction asymmetry to steer the motion of microscopic particles. H ...
AMER CHEMICAL SOC2022