8 papers
Hydrodynamics of Cooperation and Self-Interest in a Two-Population Occupation Model
Jerome Garnier-Brun, Ruben Zakine, Michael Benzaquen
We study the hydrodynamics of a system of agents who optimize either their individual utility (self-interest) or the collective welfare (cooperation). When agents act selfishly, th…
On the relative packing densities of pistachios and pistachio shells
Ruben Zakine, Michael Benzaquen
Given an appetizer bowl full of pistachios, what is the optimal size of the container -- neither too small, nor too big -- needed for accommodating the resulting non-edibl…
Active Young-Dupré Equation: How Self-organized Currents Stabilize Partial Wetting
Yongfeng Zhao, Ruben Zakine, Adrian Daerr +3
The Young-Dupré equation is a cornerstone of the equilibrium theory of capillary and wetting phenomena. In the biological world, interfacial phenomena are ubiquitous, from the spre…
Evolving motility of active droplets is captured by a self-repelling random walk model
Wenjun Chen, Adrien Izzet, Ruben Zakine +3
Swimming droplets are a class of active particles whose motility changes as a function of time due to shrinkage and self-avoidance of their trail. Here we combine experiments and t…
Spatial Organization of Active Particles with Field Mediated Interactions
Ruben Zakine, Jean-Baptiste Fournier, Frédéric van Wijland
We consider a system of independent point-like particles performing a Brownian motion while interacting with a Gaussian fluctuating background. These particles are in addition endo…
Surface Tensions between Active Fluids and Solid Interfaces: bare vs dressed
Ruben Zakine, Yongfeng Zhao, Miloš Knežević +4
We analyze the surface tension exerted at the interface between an active fluid and a solid boundary in terms of tangential forces. Focusing on active systems known to possess an e…