307 citations · 1.4k across the 18 of their papers we have counts for
18 papers
Modeling collective behaviors from optic flow and retinal cues
Diego Castro, Franck Ruffier, Christophe Eloy
Animal collective behavior is often modeled with self-propelled particles, assuming each individual has ``omniscient'' knowledge of its neighbors. Yet, neighbors may be hidden from…
Hydrodynamic force on a small squirmer moving with a time-dependent velocity at small Reynolds numbers
T. Redaelli, F. Candelier, R. Mehaddi +2
We calculate the hydrodynamic force on a small spherical, unsteady squirmer moving with a time-dependent velocity in a fluid at rest, taking into account convective and unsteady fl…
Searching for a source without gradients: how good is infotaxis and how to beat it
Aurore Loisy, Christophe Eloy
Infotaxis is a popular search algorithm designed to track a source of odor in a turbulent environment using information provided by odor detections. To exemplify its capabilities,…
Seismic response of cylinder assemblies in axial flow
Roberto Capanna, Guillaume Ricciardi, Emmanuelle Sarrouy +1
Earthquakes are a great challenge for the safety of nuclear reactors. To address this challenge, we need to better understand how the reactor core responds to seismic forcing. The…
Surfing on turbulence: a strategy for planktonic navigation
Rémi Monthiller, Aurore Loisy, Mimi A. R. Koehl +2
In marine plankton, many swimming species can perceive their environment with flow sensors. Can they use this flow information to travel faster in turbulence? To address this quest…
How memory architecture affects learning in a simple POMDP: the two-hypothesis testing problem
Mario Geiger, Christophe Eloy, Matthieu Wyart
Reinforcement learning is generally difficult for partially observable Markov decision processes (POMDPs), which occurs when the agent's observation is partial or noisy. To seek go…
Rebound and scattering of motile Chlamydomonas algae in confined chambers
Albane Théry, Yuxuan Wang, Mariia Dvoriashyna +3
Motivated by recent experiments demonstrating that motile algae get trapped in draining foams, we study the trajectories of microorganisms confined in model foam channels (section…
Zonal flow in a resonant precessing cylinder
Donglai Gao, Patrice Meunier, Stéphane Le Dizès +1
A cylinder undergoes precession when it rotates around its axis and this axis itself rotates around another direction. In a precessing cylinder full of fluid, a steady and axisymme…
Tree crowns grow into self-similar shapes controlled by gravity and light sensing
L. Duchemin, C. Eloy, E. Badel +1
Plants have developed different tropisms: in particular, they re-orient the growth of their branches towards light (phototropism) or upwards (gravitropism). How these tropisms affe…
Model of collective fish behavior with hydrodynamic interactions
Audrey Filella, François Nadal, Clément Sire +2
Fish schooling is often modeled with self-propelled particles subject to phenomenological behavioral rules. Although fish are known to sense and exploit flow features, these models…
Collective Motion with Anticipation: Flocking, Spinning, and Swarming
Alexandre Morin, Jean-Baptiste Caussin, Christophe Eloy +1
We investigate the collective dynamics of self-propelled particles able to probe and anticipate the orientation of their neighbors. We show that a simple anticipation strategy hind…
Shape of optimal active flagella
Christophe Eloy, Eric Lauga
Many eukaryotic cells use the active waving motion of flexible flagella to self-propel in viscous fluids. However, the criteria governing the selection of particular flagellar wave…
Flow-Induced Draping
Lionel Schouveiler, Christophe Eloy
Crumpled paper or drapery patterns are everyday examples of how elastic sheets can respond to external forcing. In this Letter, we study experimentally a novel sort of forcing. We…
Kinematics of the most efficient cilium
Christophe Eloy, Eric Lauga
In a variety of biological processes, eukaryotic cells use cilia to transport flow. Although cilia have a remarkably conserved internal molecular structure, experimental observatio…
The origin of hysteresis in the flag instability
Christophe Eloy, Nicolas Kofman, Lionel Schouveiler
The flapping flag instability occurs when a flexible cantilevered plate is immersed in a uniform airflow. To this day, the nonlinear aspects of this aeroelastic instability are lar…
Leonardo's rule, self-similarity and wind-induced stresses in trees
Christophe Eloy
Examining botanical trees, Leonardo da Vinci noted that the total cross-section of branches is conserved across branching nodes. In this Letter, it is proposed that this rule is a…
Optimal Strouhal number for swimming animals
Christophe Eloy
To evaluate the swimming performances of aquatic animals, an important dimensionless quantity is the Strouhal number, St = fA/U, with f the tail-beat frequency, A the peak-to-peak…
Aeroelastic instability of cantilevered flexible plates in uniform flow
Christophe Eloy, Romain Lagrange, Claire Souilliez +1
We address the flutter instability of a flexible plate immersed in an axial flow. This instability is similar to flag flutter and results from the competition between destabilising…