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Farhang (Franck) RADJAI


1998   Habilitation (HDR), Physics, University of Rennes 1, France

1995   PhD, Physics, Paris Sud University

1992   Master, Physics, Ecole Normale Supérieure-Paris Sud University


2005-present       Research Director (first class), Centre Nationale de la Recherche Scientifique (CNRS), France


2014-2017     MOT visiting researcher, member of the joint CNRS-MIT laboratory, MIT, Cambridge, USA

1997-2005     Junior researcher, Centre Nationale de la Recherche Scientifique (CNRS), France

1995-1997    Postdoctoral research fellow, Juelich Supercomputing Center (HLRZ) and University of Duisburg, Germany


2018-2019      Labex NUMEV fellowship (120 k€), MIPS department, University of Montpellier, Bio-stabilization of granular soils

2016                Reward for Education and Research, CNRS

2014-2017      Fellowship (120 k€), Statistical homogenization of granular materials, MIPS department, University of Montpellier, France

2014-2017      ERC-Adv (GA n◦290963), Critical State Soil Mechanics Revisited: Fabric Effect (SOMEF), PI: M. Dafalias. CNRS co-beneficiary (70 k€), Micromechanical modeling of clays.

2014-2017      Agropolis Foundation fellowship (164 k€), CIRAD, Modeling root growth in granular soils, PI (with T. Fourcaud, CIRAD), Montpellier, France.

2013-2015      MIT-France Seed Fund (19 k$), MIT, Micromechanical modeling of natural granular media, Mechanics department, USA, PI (with K. Kamrin, MIT);

2012               Reward for Scientific Excellence, CNRS

2012-2015      Ecos-Nord France-Colombia (travel expenses), Modeling environmental granular processes, PI (with N. Estrada, Los Andes University).


1997-2021      27 PhD students, 8 Postdocs


2-4/09/2019    International workshop, Multiscale modeling for strategic materials, University of Montpellier. Organized with K. Iouannidou, R. Pellenq (MIT), F. Nicot (IRSTEA), O. Millet (University of La Rochelle), 80 participants, 50 talks, interfacing physics, chemistry and mechanics.

3-7.07.2017    International conference on Powders and Grains (chair), Montpellier, France. 500 participants, 396 papers, 90 talks, and 330 posters. This is the largest interdisciplinary conference on granular materials taking place every four years.

9-11.07.2014  International conference on Modeling Granular Media Across Scales (chair), Montpellier. 80 participants, 45 talks. Organized with K. Kamrin (MIT) and J.-Y. Delenne (INRA).

3-7.09.2012    CISM Advanced Course (International Center of Mechanical Sciences) on Multiscale modeling of granular materials, Udine (Italy). Organized with K .Soga (University of Cambridge) 

I also organized two mini-symposia during International Conference on Particle-based Methods (28-30/09/2015, Barcelona, Spain), 1 mini-symposium in 8th International Conference on Discrete Element Methods (DEM8) (21-26.07.2019, University of Twente, Enschede, Netherlands), 1 mini-symposium in CSMA 2019 (14th National Colloquium for Computation of Structures) (13-17.05.2019, Giens, France), 1 mini-symposium in Materials Congress (24-28.11.2014, Montpellier), 1 mini-symposium in EMI International Conference (3-5.07.2019, Lyon, France), 1 workshop in ALERT Geomaterials meeting (29.09.2014-2.10.2014, Aussois, France). I have been member of scientific committee of several major conferences such as Particles (since 2015), Powders and Grains (since 2002), DEM8 (2019, Netherlands), EMI 2019, IWBDG 2014. 


2010-present   Leader of the Physics and Mechanics of Discrete Media team (, 5 permanent members.

2000-2010        Leader of Granular Solids cross-disciplinary research group in LMGC.

1999-2007        Co-leader (with O. Pouliquen) of the CNRS GdR MiDi (Milieux Divisés) federating French laboratories working on granular materials.

2011-present   Active member (representing University of Montpellier) of the Alliance of Laboratories in Europe for Education, Research and Technology (ALERT) in Geomaterials ( Elected member of Board of Directors in 2021. 

2011-present   Founding member of MiDi Network (Réseau MiDi) since 2011 in Montpellier, an interdisciplinary hub of researchers in physics, food science, geology, hydrosciences and mechanics.


My research is focused on granular materials from a modeling perspective and in a cross-disciplinary context involving physics and mechanics, with applications to geomaterials, powder processing, geological surface processes, and some biomaterials. My papers on micromechanical analysis of stress transmission (strong and weak subnetworks), stress partition (force and fabric anisotropy) and scale-dependent nonaffine velocity fields (granulence) are among the most cited papers in the field. My two papers on force transmission in granular media in 1996 and 1998 have been cited more than 1000 times. I popularized the contact dynamics method for discrete simulation of granular materials, and developed advanced particle dynamics algorithms for complex granular materials. During the last 10 years, I carried out the first extensive parametric simulations of submerged granular flows, packings of polyhedral, elongated and nonconvex particles, and strongly polydisperse granular materials. I also analyzed the influence of such realistic material parameters on the rheological behavior (shear strength, dilatancy, anisotropy, connectivity). I was visiting scientist in MIT for three years, and invited by several prominent scientists to give seminars in Boston, Chicago, Durham, and New York City. In 2019, I have 121 papers in peer-reviewed journals  (including 3 review papers, 1 Sci. Rep., 7 Phys. Rev. Lett.), 7 books, 31 book chapters, 79 publications in proceedings, 254 communications in national and international workshops, 67 invited talks in national and international workshops, 40 invited seminars, 16 populariation articles, 2 patents, and 5 softwares (referenced by Renater).