Old Stuff

A curing polymeric solution can be used to device complex mechanical metamaterials by depositing droplets on its free surface or within its bulk. The deposition can be done layer by layer or vía capillary instabilities such as Rayleigh-Plateau's.  You can check some of our recent work here:

• Printing on liquid elastomers (2020) with P.-T Brun, J. Marthelot and P. Reis.

• Metarpillar: Soft robotic locomotion based on buckling-driven elastomeric metamaterials (2021) with H. Palza, J.C. Zagal, B. Grossi, and G. Düring

When a dissipative system is driven in a statistically stationary regime by an external forcing, some (or all) of the relevant physical quantities display large fluctuations with very different probability density functions (PDF). However, in some cases, simple universal features can be found. We have shown that in the case of a gaussian random forcing, non-equilibrium stationary states (NESS) display injected power fluctuations that show the same kind of PDF with long exponential asymmetric tails. We have shown that the features of this PDF can be observed in systems as different as wave turbulent states or random bouncing balls.  You can check some of our recent work here:

• Additive noise induces Front propagation (2005) with M. G. Clerc and E. Tirapegui

• Fluctuations of energy flux in wave turbulence (2008) with Eric Falcon, Sébastien Aumaître, Claude Laroche and Stéphan Fauve

• Fluctuations of energy flux in a simple dissipative out-of-equilibrium system (2009) with Eric Falcon

Amplitude equations are a simple way to describe, via symmetry arguments, the development of instabilities and, thus, pattern-forming mechanisms. We have theoretically studied the front propagation motion when noise is added to the system, which was then experimentally measured in granular systems. You can check some of our recent work here:

• Subharmonic wave transition in a quasi-one-dimensional noisy fluidized bed (2009) with Ignacio Ortega, Marcel G. Clerc and Nicolás Mujica,

• Localized structures in Vibrated Emulsions (2012) with Jake Bruggeman, Matteo Pasquali and Robert D. Deegan

• Dynamics of spatially modulated kinks in shallow granular layers (2014) with J. E. Macías

• Gravity wave instability in a turbulent free-surface Taylor–Couette flow: experiments and comparison with an amplitude equation with additive noise (2015) with J. Martínez-Mercado, Cristóbal Arratia and Nicolás Mujica