Curriculum Vitae - APC - Université Paris Diderot-Paris 7

well by measuring, for instance, the variations of the particle current at the outlet as a function
of the particledensity and the particle speed. After having characterized the stability of the
ordered unidirectional traffic, we will be ready to address the question of the emergence of
collective motion in absence of any external bias in a periodic network. We will then move on
to the ultimate goal of this project. We will devise random fluidic-networks (using the same
technique as in V.2.2), and will check whether spontaneous correlated motion can arise in
such disordered media. To do so, we will most certainly begin with the simple geometries
sketched in Fig. 7C and 7D, namely: (i) tree-networks (loop free) and (ii) random obstacle
networks. Finally, we note that all the questions addressed for the traffic of driven droplets in
disordered networks would deserve to be addressed in the case of motile particles: what is the
escape-time distribution, and obviously can traffic jams form spontaneously and yield
network congestion. The tasks we have briefly described in this proposal are obviously the
very first steps toward a long-term and ambitious research program.
Figure 7. A-Traffic of active rollers on microfluidic square lattice. B- Dipolar pertubation induced by a motile
particle moving in a homogeneous fluidic network. The flow disturbance results from the local perturbation of
the channel conductivity by the mobile particle.
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