Description du projet :
The project deals with the mathematical modelling and the numerical simulation of (non-cohesive) sediment transport in rivers and/or hydraulic engineering processes. The accurate modelling of sedimentation has a great impact on the behavior of free surface flows in rivers (modifications of the morphology of rivers) and in hydraulic processces (optimization of dam flush event for instance)
The design of appropriate mathematical models and numerical methods for the simulation of sedimentation processes is indeed of great importance to understand the large-time behavior of free-surface rivers flows (modification of riverbed morphology) and to guide hydraulic engineers toward a sustainable river management (optimization of dam flush event for instance). From the industrial viewpoint, the flushing of dam retention lakes is crucial for an optimal exploitation of dams, and a longest lifetime of the installation.
This project is at the crossroads between the microscopic modelling of non-cohesive sediments in rivers and the three-dimensional simulation of large-scale free-surface flows. The scientific expertise for the former is brought by the French team, who is specialized in physical modeling, theoretical fluid mechanics and mathematical physics ; on the other hand, the Swiss team is specialized in scientific computing and numerical simulation of large 3D physical and industrial processes. The collaboration between French and Swiss teams will thus be useful to couple these two approaches in a optimal and innovative way, as the two groups are very complementary. Moreover, when bringing people with different backgrounds, meeting in person is crucial ofr the initial progress of the project.
This project is in the continuity of projects sponsored by the SNF on numerical simulation of impulse waves, and development of a multiphysics numerical algorithms and solvers (see Section 6 : Collaborations existantes for more details), and undertaken in parallel to an ANR proposal led by the French team oriented on the mathematical rheology of sediments flows. This part of the collaboration will focus on the scientific computing aspects of the simulation. The deliverable will be a module of a computer software (so-called cfsFlow, developed by EPFL and transferred to Ycoor systems SA, a spin-off of EPFL, via a technology transfer). Validation will be achieved through benchmark cases in dam break flows and rivers, at the laboratory and geophysical scales. Finally, the simulation of a flush event in a dam retention lake will be considered.
Equipe de recherche au sein de la HES-SO:
Partenaires académiques: 516,International Business Management
Durée du projet:
01.01.2016 - 10.04.2018
Montant global du projet: 9'000 CHF