Philippe Frey

Contact

Univ. Grenoble Alpes, INRAE
IGE – Institute of Environmental Geosciences
2 rue de la Papeterie, BP 76,
38 402 St-Martin-d’Hères - France

Tel. +33 (0)4 76 76 27 71
philippe.frey[at]inrae.fr

Membre de l’équipe HyDRIMZ-STRIM

Research interests

Fluid mechanics, environmental hydraulics, sediment transport, fluvial geomorphology
Experimentations (see narrow flume) , modelling, image analysis
Application to mountain stream and gravel-bed river natural hazard prevention and mitigation
Associate Editor Journal of Hydraulic Engineering (ASCE). See editorial board

Education

HdR, Supervising Habilitation, Grenoble, 2008
PhD, Fluid Mechanics, Lyon, 1991
Professional Engineer, ENGEES, Strasbourg, 1989 and ENGREF, Paris, 1997

Supervising

Completed PhDs

  • Böhm, T., 2005: Motion and interaction of a set of particles in a supercritical flow, PhD Terre Univers Environnement, Université Joseph Fourier, Grenoble I, 172 p.
  • Recking, A., 2006: Etude expérimentale de l’influence du tri granulométrique sur le transport solide par charriage, An experimental study of grain sorting effects on bedload. PhD mécanique des fluides, Insa Lyon, 243p.
  • Hergault V. 2011 : Etude microstructurelle du transport solide par charriage à forte pente en granulométrie étendue. Université de Grenoble, 180p.
  • Bacchi V. 2011 Etude expérimentale de la dynamique sédimentaire d’un système à forte pente soumis à des conditions hydrauliques faibles Université de Grenoble, 209p.
  • Maurin R., 2015 Investigation of granular behavior in bedload transport using an eulerian-lagrangian model, Université Grenoble Alpes, 142 pp.
  • Dudill Ashley 2016 : Size segregation in bedload transport. Univ. Grenoble Alpes and University of British Columbia, Dept of Geography with Mike Church (joint/co-tutelle PhD), 151 p.
  • Lafaye de Micheaux Hugo 2017 : Ségrégation en transport solide par charriage en montagne: traitement d’images et étude expérimentale. Université de St Etienne, 172 p.
  • Chassagne Rémi 2020 Size segregation in bedload sediment transport: discrete element modelling, Univ. Grenoble Alpes. 137 p.
  • Rousseau Hugo 2021 Segregation processes in bedload sediment transport: experimental and theoretical study, Univ. Grenoble Alpes. 117p.

PhDs in progress

  • Dedieu Benjamin 2021 - : Modélisation expérimentale et numérique de la ségrégation en transport de sédiments. Physical and numerical modelling of segregation in sediment transport , Univ. Grenoble Alpes, with Julien Chauchat.
  • Dallons Louise 2021 - : Trajectoire du système multirisque de la Vallouise entre 1600 et 2020 AD. Multirisk trajectory of the Vallouise valley, French Alps, 1600 to 2020 CE, Univ. Grenoble Alpes, with Florie Giacona.

Flagship Project

ANR SegSed : Size Segregation in Sediment Transport
The overall objective of this project (Pi P. Frey) is to conduct a multi-scale and multi-disciplinary study of size segregation in sediment transport. More information on ANR and here

Particle Tracking

with Hugo Lafaye de Micheaux and C. Ducottet
– Matlab Package BeadTracking download
– Ground truth on experimental bedload of spherical beads on Zenodo

Teaching

‘Sediment Transport’ course in International Master2 ‘Environmental Fluid Mechanics’, University Grenoble Alpes.

Publications

Selection of refereed journal publications. In bold PhD candidate

  • Dedieu, B, Rousseau, H, Chauchat, J, Frey, P. 2024. Exploring the size ratio impact on an intruder segregating in bedload transport. Physical Review Fluids 9(10): 104302.
  • Rousseau H, Chassagne R, Chauchat J, Maurin R, Frey P. 2021. Bridging the gap between particle-scale forces and continuum modelling of size segregation: Application to bedload transport. Journal of Fluid Mechanics 916: A26.
  • Church M, Dudill A, Venditti JG, Frey P. 2020. Are results in geomorphology reproducible? Journal of Geophysical Research: Earth Surface 125: e2020JF005553.
  • Chassagne R, Maurin R, Chauchat J, Gray JMNT, Frey P. 2020. Discrete and continuum modelling of grain size segregation during bedload transport. Journal of Fluid Mechanics 895: A30.
  • Frey P, Lafaye de Micheaux H, Bel C, Maurin R, Rorsman K, Martin T, Ducottet C. 2020. Experiments on grain size segregation in bedload transport on a steep slope. Advances in Water Resources 136: 103478.
  • Dudill A, Lafaye de Micheaux H, Frey P, Church M. 2018. Introducing finer grains into bedload: The transition to a new equilibrium. Journal of Geophysical Research: Earth Surface 123(10): 2602-2619.
  • Maurin R, Chauchat J, Frey P. 2018. Revisiting slope influence in turbulent bedload transport: Consequences for vertical flow structure and transport rate scaling. Journal of Fluid Mechanics 839: 135-156.
  • Lafaye de Micheaux H, Ducottet C, Frey P. 2018. Multi-model particle filter-based tracking with switching dynamical state to study bedload transport. Machine Vision and Applications 29(5): 735-747.
  • Maurin R, Chauchat J, Frey P. 2016. Dense granular flow rheology in turbulent bedload transport. Journal of Fluid Mechanics 804: 490-512.
  • Frey P. 2014. Particle velocity and concentration profiles in bedload experiments on a steep slope. Earth Surface Processes and Landforms 39 (5): 646-655.
  • Frey P, Church M. 2011: Bedload: a granular phenomenon. Earth Surface Processes and Landforms 36: 58-69.
  • Frey P, Church M. 2009. How River Beds Move. Science 325: 1509-1510.
  • Recking A, Frey P, Paquier A, Belleudy P. 2009. An experimental investigation of mechanisms responsible for bedload sheet production and migration. Journal of Geophysical Research-Earth Surface 114: F03010
  • Ancey, C., A. C. Davison, T. Böhm, M. Jodeau, and P. Frey, 2008: Entrainment and motion of coarse particles in a shallow water stream down a steep slope. J Fluid Mech, 595, 83-114.