> C. Ruyer-Quil
Simulating the flow of Bingham fluids in expansion-contraction geometries : comparison with physical experiments
Arthur Marly (ENS Lyon)
We take interest in the flow of viscoplastic fluids in an expansion-contraction geometry. We used for the simulations a finite difference discretization with a double imbricated Augmented Lagrangian method. The simulations are compared with physical experiments performed by P. Coussot and G. Chambon groups. We recover interesting features of the velocity fields
- the evolution of the boundary layer width in frustrated regimes,
- the existence of a slip line and the Poiseuille-like behaviour of the velocity above this line.
We also give updated views of the structure of the pseudo-plug zones.