Personne
Joris Heyman
Cette personne n’est plus à l’EPFL
Publications associées (32)
Modelling the vertical structure of turbulent free-surface flows over rough permeable beds
Christophe Ancey, Joris Heyman, Gauthier Paul Daniel Marie Rousseau
Understanding diffusive processes across the sediment-water interface is important for quantifying hyporheic exchanges and related biogeochemical processes (e.g., denitrification, biomass growth). Viscous, turbulent and dispersive effects all contribute to ...
2020Measuring Bedload Sediment Transport with an Acoustic Doppler Velocity Profiler
Acoustic Doppler velocity profilers (ADVP) measure the velocity simultaneously in a linear array of bins. They have been successfully used in the past to measure three-dimensional turbulent flow and the dynamics of suspended sediment. The capability of ADV ...
Asce-Amer Soc Civil Engineers2017Insight gained from Principal Component Analysis in the analysis of river morphodynamics and associated sediment fluxes.
Christophe Ancey, Joris Heyman, Blaise Etienne Marceau Dhont
Bedload transport fluxes are known to widely fluctuate in both time and space (Ma et al., 2014). The typical scales of fluctuations are broad and often overlap: from random particle motions at the grain scale to large bed morphologies evolving at the river ...
2017Entrainment,motion, and deposition of coarse particles transported by water over a sloping mobile bed
Christophe Ancey, Joris Heyman
In gravel bed rivers, bed load transport exhibits considerable variability in time and space. Recently, stochastic bed load transport theories have been developed to address the mechanisms and effects of bed load transport fluctuations. Stochastic models i ...
Wiley-Blackwell2016The nature and role of advection in advection-diffusion equations used for modelling bed load transport
Christophe Ancey, Joris Heyman
The advection-diffusion equation arises quite often in the context of sediment transport, e.g., for describing time and space variations in the particle activity (the solid volume of particles in motion per unit streambed area). Stochastic models can also ...
2016A parametrical study on secondary flow in sharp open-channel bends: experiments and theoretical modelling
The dependence of curvature-induced secondary flow on the curvature ratio H/R (H is the average flow depth and R is the centreline radius of curvature), the Froude number Fr, and the dimensionless roughness coefficient Cf was systematically investigated in ...
Elsevier Science Bv2016Exploring the physics of sediment transport in non-uniform super-critical ows using a large dataset of particle trajectories
Christophe Ancey, Joris Heyman
In this article, we present 10 experiments carried out in a steep, shallow water ume made of an erodible bed of natural, uniform gravel. We simultaneously recorded bed load particle motion, bed and water elevation using two high-speed cameras. Particle tra ...
Wiley-Blackwell2015Stochastic interpretation of the advection diffusion equation and its relevance to bed load transport
Christophe Ancey, Joris Heyman
The advection diffusion equation is one of the most widespread equations in physics. It arises quite often in the context of sediment transport, e.g., for describing time and space variations in the particle activity (the solid volume of particles in motio ...
American Geophysical Union2015Secondary flow in sharp open-channel bends: experiments and modelling
Anton Schleiss, Alexandre Blanc, Joris Heyman
The dependence of curvature-induced secondary flow on the curvature ratio H/R and the Froude number Fr was systematically investigated in a series of 18 experiments in a sharply-curved laboratory flume. The investigated flow depths were 0.9 m, 0.13 m, 0.19 ...
2015Secondary flow in sharp open-channel bends: experiments and modelling
Anton Schleiss, Koen Blanckaert, Joris Heyman
The dependence of curvature-induced secondary flow on the curvature ratio H/R and the Froude number Fr was systematically investigated in a series of 18 experiments in a sharply-curved laboratory flume. The investigated flow depths were 0.9 m, 0.13 m, 0.19 ...
2015