Publications

2026

31.

Geometry and forcing-induced transport in a vibrated granular ratchet

Javier Pillado and Germán Varas

in preparation

30.

Earthquake Dynamics as a Benchmark for Scale-Invariant Behavior

K. Duplat, G. Varas, and O. Ramos

submitted to Communications Physics

29.

From Beverloo discharge to distributed granular filtration on an inclined mesh

J. Pillado, V. Vidal, N. Taberlet and G. Varas

submitted to Phys. Rev. E

28.

Avalanches in disk-star mixtures in a slowly rotating drum

F. M. Diaz, L. Pugnaloni and G. Varas

submitted to Powder Technology

27.

Transport of a Single Particle in a Vibrating Ratchet System

Javier Pillado and Germán Varas

accepted at Phil. Trans. R. Soc. A

26.

Fluid rise in deformable granular media: An interdisciplinary review of laboratory experiments

Germán Varas and Valérie Vidal

accepted at Phil. Trans. R. Soc. A

2025

25.

Artificial intelligence applied to soil compaction control for the light dynamic penetrometer method

J. Rojas-Vivanco, J. García, G. Villavicencio, M. Benz, A. Herrera, P. Breul, G. Varas, P. Moraga, J. Gornall and H. Pinto

Mathematics, 13, 3359

24.

Deep Reinforcement Learning for Sim-to-Real Robot Navigation with a Minimal Sensor Suite for Beach-Cleaning Applications

Guillermo Cid Ampuero, Gabriel Hermosilla, German Varas and Matías Toribio Clarkl

Applied Sciences, 15, 10719

23.

Memory effect on gas percolation in saturated porous media

Germán Varas and Valérie Vidal

Phys. Rev. E, 112, 025420

2024

22.

Interaction between gas channels in water-saturated sands

Germán Varas, Gabriel Ramos and Valérie Vidal

Phys. Rev. E, 110, 024901

21.

RL-Based Sim2Real Enhancements for Autonomous Beach Cleaning Agents

Francisco Quiroga, Gabriel Hermosilla, German Varas, Francisco Alonso and Karla Schröder

Applied Sciences, 14, 4602

2022

20.

Geometry-controlled phase transition in vibrated granular media

René Zuñiga, Germán Varas and Stéphane Job

Scientific Reports, 12, 14989

19.

Geometrical description of impact cratering under microgravity conditions

Cristian Villalobos, Mauricio Housset and Germán Varas

Granular Matter, 24, 64

2021

18.

Extending the Boussinesq model for impacts in granular media

F. Martínez, M. P. Urrea, C. M. Gonzalez and G. Varas

Granular Matter, 23, 3

2020

17.

Stability of a liquid jet impinging on confined saturated sand

J. Vessaire, G. Varas, S. Joubaud, R. Volk, M. Bourgoin and V. Vidal

Phys. Rev. Lett. 124, 224502

2019

16.

Friction weakening by mechanical vibrations: a velocity-controlled process

V. Vidal, C. Oliver, H. Lastakowski, G. Varas and J.-C Géminard

European Physical Journal E, 42, 91

15.

3D morphology and timing of the giant fossil pockmark, Beauvoisin Basin, SE France

A. Gay, M. Lopez, J.-L. Potdevin, V. Vidal, G. Varas, A. Favier and N. Tribovillard

Journal of the Geological Society, 176, 61-77

2017

14.

Influence of obstacles on bubbles rising in water-saturated sand

R. Poryles, G. Varas and V. Vidal

EPJ Web of Conferences, 140, 09002

13.

Stability of gas channels in a dense suspension in presence of obstacles

R. Poryles, G. Varas and V. Vidal

Phys. Rev. E, 95, 062905

2016

12.

Bubbles trapped in a fluidized bed: Trajectories and contact area

R. Poryles, V. Vidal and G. Varas

Phys. Rev. E, 93, 032904

2015

11.

Gas-induced fluidization of mobile liquid-saturated grains

G. Ramos, G. Varas, J.-C. Géminard and V. Vidal

Phys. Rev. E, 92, 062210

10.

Flow and fracture in water-saturated, unconstrained granular beds

G. Varas, G. Ramos, J.-C. Géminard and V. Vidal

Frontiers in Physics, 3, 44

2013

9.

Air invasion in a granular layer immersed in a fluid: morphology and dynamics

G. Varas, J.-C. Géminard and V. Vidal

Granular Matter, 15, 801-810

2012

8.

Etude de la croissance de la zone fluidifiée lors de l’injection d’air dans des grains immergés

V. Vidal, G. Varas and J.-C. Géminard

Non-Linéaire Publications, p.209-214

2011

7.

Morphologie of air invasion in an immersed granular layer

G. Varas, V. Vidal and J.-C. Géminard

Phys. Rev. E, 83, 061302

6.

Venting dynamics of an immersed granular layer

G. Varas, V. Vidal and J.-C. Géminard

Phys. Rev. E, 83, 011302

5.

'Venting' dans un milieu granulaire immergé

V. Vidal, G. Varas and J.-C. Géminard

Non-Linéaire Publications, p.175-180

2010

4.

Dynamique de dégazage dans un milieu granulaire immergé: différents aspects

V. Vidal, G. Varas and J.-C. Géminard

Non-Linéaire Publications, p.199-204

2009

3.

Dynamics of crater formations in immersed granular materials

G. Varas, V. Vidal and J.-C. Géminard

Phys. Rev. E, 79, 021301

2008

2.

Liquid-solid-like transition in quasi-one-dimensional driven granular media

M.G. Clerc, P. Cordero, J. Dunstan, K. Huff, N. Mujica, D. Risso and G. Varas

Nature Physics, 4, 249-254

2007

1.

Collective Behavior in a Granular Jet: Emergence of a Liquid with Zero Surface Tension

X. Cheng, G. Varas, D. Citron, H. M. Jaeger and S. R. Nagel

Phys. Rev. Lett. 99, 188001