Publication
Dynamics of a flexible helical filament rotating in a viscous fluid near a rigid boundary
Related publications (55)
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The emplacement of magmatic intrusions in the earth’s crust has been investigated for decades. The driving mechanism is the density difference between the fluid and the rock. In the absence of heterogeneities, this difference creates a constant buoyancy fo ...
2023A weakly nonlinear amplitude equation approach to the bypass transition in the two-dimensional Lamb–Oseen vortex
François Gallaire, Yves-Marie François Ducimetière
We analytically derive an amplitude equation for the weakly nonlinear evolution of the linearly most amplified response of a non-normal dynamical system. The development generalizes the method proposed in Ducimetière et al. (J. Fluid Mech., vol. 947, 2022, ...
2023Identifying invariant solutions of wall-bounded three-dimensional shear flows using robust adjoint-based variational techniques
Tobias Schneider, Omid Ashtari
Invariant solutions of the Navier-Stokes equations play an important role in the spatiotemporally chaotic dynamics of turbulent shear flows. Despite the significance of these solutions, their identification remains a computational challenge, rendering many ...
Cambridge2023On the Capability of Wall-Modeled Large Eddy Simulations to Predict Particle Dispersion in Complex Turbulent Flows
Mohamed Aly Hashem Mohamed Sayed
Predicting particle transport in turbulent flows has a plethora of applications, some of which are: the transport of atmospheric aerosols, the deposition of blood cells in the arteries of human bodies and the atomization of fuel droplets in combustion cham ...
EPFL2022Scaling of the translational velocity of vortex rings behind conical objects
Ring vortices are efficient at transporting fluid across long distances. They can be found in nature in various ways: they propel squids, inject blood in the heart, and entertain dolphins. These vortices are generally produced by ejecting a volume of fluid ...
2021Modelling the vertical structure of turbulent free-surface flows over rough permeable beds
Christophe Ancey, Joris Heyman, Gauthier Paul Daniel Marie Rousseau
Understanding diffusive processes across the sediment-water interface is important for quantifying hyporheic exchanges and related biogeochemical processes (e.g., denitrification, biomass growth). Viscous, turbulent and dispersive effects all contribute to ...
2020Optimal spanwise-periodic control for recirculation length in a backward-facing step flow
François Gallaire, Edouard Boujo, Eunok Yim
Three-dimensional control is considered in the flow past a backward-facing step (BFS). The BFS flow at Reynolds number Re = 500 (defined with the step height and the maximum inlet velocity) is two-dimensional and linearly stable but increasingly receptive ...
AMER PHYSICAL SOC2020Turbulent Flows over Rough Permeable Beds in Mountain Rivers: Experimental Insights and Modeling
Gauthier Paul Daniel Marie Rousseau
Steep mountain streams exhibit shallow waters with roughness elements such as stones and pebbles that are comparable in size to flow depth. Owing to the difficulty in measuring fluid velocities at the interface, i.e., from the rough permeable bed to the fr ...
EPFL2019On Von Karman Modeling For Turbulent Flow Near A Wall
Jacques Rappaz, Jonathan Rochat
Mixing-length models are often used by engineers in order to take into account turbulence phenomena in a flow. This kind of model is obtained by adding a turbulent viscosity to the laminar one in Navier-Stokes equations. When the flow is confined between t ...
2019Méthodes numériques liées à la distribution d'alumine dans une cuve d'électrolyse d'aluminium
Metallic aluminium plays a key role in our modern economy. Primary
metallic aluminium is produced by the transformation of aluminium
oxide using the Hall-Héroult industrial process. This process, which
requires enormous quantities of energy, consists in pe ...
EPFL2019