PhD defense : 3D Modeling of flow and sediment transport in tanks with cavities

PhD defense : Liu YI

Team : MécaFlu

Title : 3D Modeling of flow and sediment transport in tanks with cavities

Abstract : The investigation on sediment transport in tanks is mainly for optimizing the design of tank in stormwater system and sewers. The flow pattern is the primary factor controlling the movement of particle. Therefore, the emphasis of this investigation is to determine the flow pattern and estimate the deposition of particle. Both computational fluid dynamics and experimental methods are applied to accomplish the research. Numerical simulation are processed by using three different geometries, where a volume of fluid model is applied for tracking the free-surface and a discrete phase model is used for calculation of particle trajectory, and an user defined function based on Shields curve is implemented to the boundary for improving the simulation on sedimentation. A series of experiments are carried out in a rectangular tank with a cavity, where velocity measurements are finished for experiments under different conditions and the sediment deposition is recorded. The comparison between numerical simulation and experimental results show better agreement in the prediction of flow, the improvement on particle deposition needs further modification in the particle tracking model.

This thesis was supervised by Abdellah Ghenaim, Professor at the INSA of Strasbourg.

The jury is composed of : A. Ghenaim, D. Dartus (Professor at IMFT of Toulouse), A. Ouahsine (Professor at the UT of Compiègne), P-A. Garambois (Associate professor at INSA of Strasbourg) et A. Terfous (Associate professor with habilitation at INSA of Strasbourg).

The PhD defense (in english) will be held on Friday 23th June 2017 at 2.00pm in the De Dietrich amphitheater at INSA of Strasbourg.