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Laboratoire des Écoulements Géophysiques et Industriels

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Accueil > Remi Chassagne

	Remi Chassagne
	Maître de conférences
	Téléphone :+33429073693 otherwise	Na strange 824 number. Other : 9
	Courriel :	Remi.Chassagne *or 1958794470 no-reply(A)gmail.com* and legi.grenoble-inp.fr**
	Bureau :Piole120. Manager : 39	G125
	Équipe :	MEIGE

Voir en ligne : Rémi Chassagne WebPage

I am a researcher at LEGI, currently holding a post-Doc position under the supervision of Julien Chauchat.

My research activity concerns the study of the physical processes at stake during sediment transport with a mechanistic and granular approach. I focus on two main lines :

the study of the interactions between sediment particles of different sizes and in particular of vertical grain size segregation and diffusion remixing. During my PhD, I have studied, with a coupled fluid-DEM model, the infiltration dynamics of small grains in a large particle bed. I also studied the impact of size segregation on sediment transport.

the modeling of sediment transport with a Eulerian-Eulerian model (two phase flow modeling using the SedFoam code) with a particular focus on the coupling between the fluid phase and the granular phase and on the modeling of the granular phase behavior.

My research work is part of an upscaling process, the objectives of which are to bring small scale closures and results toward larger scale modeling through continuum modeling.

Prior to my PhD thesis, I have studied the formation of undular bore in channel with banks, known to exhibit two undular bore regimes (low Froude and high Froude regimes). I have highlighted and explained a new non-dispersive effect, due to refraction on the banks, responsible for the low Froude regime.

My CV

Publications

2023

Chassagne, R., Bonamy, C., & Chauchat, J. (2023). A frictional–collisional model for bedload transport based on kinetic theory of granular flows: discrete and continuum approaches. Journal of Fluid Mechanics, 964, 27.

2022

Bonamy, C., Chauchat, J., Augier, P., Mathieu, A., Clémençot, Q., Chassagne, R., et al. (2022). fluidfoam.

2021

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).

2020

Chassagne, R., Frey, P., Maurin, R., & Chauchat, J. (2020). Mobility of bidisperse mixtures during bedload transport. Physical Review Fluids, 5(11), 114307.

Chassagne, R., Maurin, R., Chauchat, J., & Frey, P. (2020). Discrete simulations of an armoured sediment bed during bedload transport. In EGU General Assembly 2020. Vienna (Online), Austria.

Chassagne, R., Maurin, R., Chauchat, J., Gray, J., & Frey, P. (2020). Discrete and continuum modelling of grain size segregation during bedload transport. Journal of Fluid Mechanics, 895, 365–398.

Frey, P., Rousseau, H., Chassagne, R., Maurin, R., & Chauchat, J. (2020). Discrete element methods and continuum models in bedload transport. In EGU General Assembly 2020. Vienna (Online), Austria.

Rousseau, H., Chassagne, R., Chauchat, J., & Frey, P. (2020). Continuous modeling of grain size segregation in bedload transport. In EGU General Assembly 2020. Vienna, Austria.

2018

Chassagne, R., Chauchat, J., Maurin, R., & Frey, P. (2018). Discrete element simulations and continuous modeling of vertical size-segregation in bedload transport.

Chassagne, R., Maurin, R., Chauchat, J., & Frey, P. (2018). Discrete element simulations and continuous modeling of vertical size-segregation in bedload transport. In Agu. Washington, D.C., United States.

Chassagne, R., Maurin, R., Chauchat, J., & Frey, P. (2018). Vertical size-segregation in bedload sediment transport : from grain scale to continuum models. In EGU General Assembly 2018 (Vol. 20). Vienne, Austria.

Frey, P., Chassagne, R., Maurin, R., & Chauchat, J. (2018). Vertical grain size sorting in bedload transport on steep slopes with a coupled fluid-discrete element model. In River Flow (Vol. 40, 04013). Lyon, France.

2016

Campagne, A., Alfredsson, H., Chassagne, R., Micard, D., Mordant, N., Segalini, A., et al. (2016). First report of the MILESTONE experiment: strongly stratified turbulence and mixing efficiency in the Coriolis platform. In VIIIth International Symposium on Stratified Flows (ISSF). San Diego, United States.