Man

German Enrique Varas Siriany

Associate Professor

Pontificia UNIVERSIDAD CATOLICA DE VALPARAISO

Valparaiso, Chile

Líneas de Investigación


Out-of-equilibrium systems; Granular materials; Fluid Dynamics; three-phase flow systems; Crater formation

Educación

  •  Physics, ECOLE NORMALE SUPERIEURE DE LYON. Francia, 2011
  •  Physics, UNIVERSIDAD DE CHILE. Chile, 2007
  •  Physics, UNIVERSIDAD DE CHILE. Chile, 2005

Experiencia Académica

  •   Assistant Professor Full Time

    PONTIFICIA UNIVERSIDAD CATOLICA DE VALPARAISO

    Science

    Valparaiso, Chile

    2011 - 2014

  •   Associate Professor Full Time

    PONTIFICIA UNIVERSIDAD CATOLICA DE VALPARAISO

    Science

    Valparaiso, Chile

    2014 - At present

Formación de Capital Humano


Current Students

- René Zuñiga (Ph.D. in physics, Pontificia Universidad Catolica de Valparaiso, expected defense 2020).
- Elram Figueroa (Ph.D. in physics, Pontificia Universidad Catolica de Valparaiso, expected defense 2022).
- Cristobal Oliver (Ph.D. in physics, Pontificia Universidad Catolica de Valparaiso, expected defense 2019).

Former students
(2019) Cristian Villalobos - Msc thesis: Formación de un cráter en una capa granula que levita - [tesis]
(2018) Mauricio Housset - Msc thesis: Sincronización en la caída libre de objetos - [tesis]
(2015) Gabriel Ramos - Msc thesis: Dinámica de invasión de aire en un medio granular inmerso en agua

Visits
(2018) Antoine Parrenin (ENS Lyon) - Interaction of multiple Granular Jump - report
(2017-2018) Jérémy Vessaire (ENS Lyon) - PIV in immersed dunes
(2017) Florence Pollet (ENS Lyon) - Dunes formation by the impact of a liquid jet - report
(2015/2016) Raphael Poryles (ENS Lyon) - Characterization of air trapped in water-saturated sands

Guidance of undergraduate students (research internships)

- Roberto Rocco (UTFSM)

Summer research internship at PUCV (*=jointly supervised)

- From PUCV: Karin Alfaro, Mauricio Housset, Gabriel Ramos, Hector Ramos* (co-advised by F. Santibañez), Alexander Cruz.
- From U.Chile: Paul Silva*, Pablo Ugalde* (co-advised by C. Falcón).


Premios y Distinciones

  •   Ph.D Fellowship, "Beca Gestion Propia para estudios de Doctorado en el extranjero"

    CONICYT

    Chile, 2007

    Fellowship for 4 years (2007-2011)


 

Article (17)

3D morphology and timing of the giant fossil pockmark of Beauvoisin, SE Basin of France
Friction weakening by mechanical vibrations: A velocity-controlled process
Influence of obstacles on bubbles rising in water-saturated sand
Stability of gas channels in a dense suspension in presence of obstacles
Stability of gas channels in a dense suspension in the presence of obstacles
Bubbles trapped in a fluidized bed: Trajectories and contact area
Bubbles trapped in a fluidized bed: Trajectories and contact area.
Flow and fracture in water-saturated, unconstrained granular beds
Gas-induced fluidization of mobile liquid-saturated grains
Gas-induced fluidization of mobile liquid-saturated grains.
Air invasion in a granular layer immersed in a fluid: morphology and dynamics
Morphology of air invasion in an immersed granular layer
Morphology of air invasion in an immersed granular layer.
Venting dynamics of an immersed granular layer
Dynamics of crater formations in immersed granular materials.
Liquid-solid-like transition in quasi-one-dimensional driven granular media
Collective behavior in a granular jet: Emergence of a liquid with zero surface tension
12
German Varas

Associate Professor

Pontificia UNIVERSIDAD CATOLICA DE VALPARAISO

Valparaiso, Chile

1
Dino Risso

Professor

Department of Physics

UNIVERSIDAD DEL BIO-BIO

Concepción, Chile

1
Aliro Cordero

Full professor

FCFM, Universidad de Chile

Santiago, Chile

1
Jocelyn Dunstan

Profesora Asistente

Ciencia de la Computación

Pontificia Universidad Católica de Chile

Santiago, Chile

1
Nicolás Mujica

Full professor

DEPARTAMENTO DE FISICA, FCFM, UNIVERSIDAD DE CHILE

Santiago, Chile