Patrick Richard's homepage - granular materials

Overview

I investigate the physics and mechanics of granular media and other disordered materials, systems in which fascinating emergent phenomena arise. These complex behaviors are often far from equilibrium and beyond the linear response regime.

Gaining insight into such systems frequently requires developing new experimental techniques, analytical tools, numerical simulations, and theoretical models.

My primary research interests include granular packings, mixing and mixtures, particle crushing, granular flows, and the optimization of processes involving granular materials.

You can also visit the web pages of the GPEM lab

Lastest News

October 2025

The paper "Discrete numerical analysis of cohesive granular flow in a thin rotating drum: Flow regimes and cohesion estimation" has been published in Powder Technology. 

March 2025 

The paper "Cohesive granular material in a rotating drum: flow regimes and size effects" has been published in Journal of Fluid Mechanics 

January 2025

new paper accepted in Journal of Fluid Mechanics : Antonio Pol, Riccardo Artoni, Patrick Richard, Cohesive granular material in a rotating drum: flow regimes and size effects 

October 2024

New paper published : Alice Ezzeddine, Bogdan Cazacliu, Patrick Richard, Luc Thorel and Riccardo Artoni, A discrete element study on sand response to cyclic loading: macro-micro perspectives. Granular Matter 26, 101 (2024). https://doi.org/10.1007/s10035-024-01467-7 

November 2023

The paper "Cohesive properties of ice powders analogous to fresh plume deposits on Enceladus and Europa" by B. Jabaud et al. has been published in Icarus. https://doi.org/10.1016/j.icarus.2023.115859

July 20th 2023

The paper "Unified scaling law for wall friction in laterally confined flows of shape anisotropic particles" written by Antonio Pol, Riccardo Artoni and myself has been accepted for publication in Physical Review Fluids.  

March 20th 2023

The paper "Sand rubber mixtures under oedometric loading", written with Pravin Badarayani, Bogdan Cazacliu, Erdin Ibraim, Riccardo Artoni has been published in Appled Sciences

March 15th 2023

The paper "Sand rubber mixtures under oedometric loading", written with Pravin Badarayani, Bogdan Cazacliu, Erdin Ibraim, Riccardo Artoni has been accepted for publication in Applied Sciences

Latest publication

see full list here

1. Alice Ezzeddine, Bogdan Cazacliu, Patrick Richard, Luc Thorel and Riccardo Artoni, A discrete element study on sand response to cyclic loading: macro-micro perspectives. Granular Matter 26, 101 (2024). https://doi.org/10.1007/s10035-024-01467-7 

2. Benoît Jabaud, Riccardo Artoni, Gabriel Tobie, Erwan Le Menn, Patrick Richard, Cohesive properties of ice powders analogous to fresh plume deposits on Enceladus and Europa, Icarus, 409, 115859, 2024 https://doi.org/10.1016/j.icarus.2023.115859

3. Cheng-Chuan Lin, Riccardo Artoni, Fu-Ling Yang and Patrick Richard, Modelling the wall friction coefficient for a simple shear granular flow in view of the degradation mechanism, Journal of Fluid Mechanics , 969 , A7, 2023 https://doi.org/10.1017/jfm.2023.556

4. Antonio Pol, Rccardo Artoni, Patrick Richard, Paulo Ricardo Nunes da Conceição and Fabio Gabrieli, Kinematics and shear-induced alignment in confined granular flows of elongated particles, accepted for publication in The New Journal of Physics, 2022

5. Patrick Richard, Alexandre Valance, Renaud Delannay, Philippe Boltenhagen, Granular surface flows confined between flat, frictional walls. Part 1. Kinematics, Journal of Fluid Mechanics, 940, A30, 2022 (Journal of Fluid Mechanics, arxiv, hal)