Abstract:
The present work deals with a numerical study of three-dimensional incompressible free-surface flow in rectilinear channel of rectangular section over a parallelepiped obstacle placed on the channel bottom wall. The finite volume computational fluid dynamics module of the Fluent software was used to solve the continuity and momentum equations. The main objective of the numerical simulation is devoted to examine the three-dimensional structure of the free-surface flow around an obstacle: Three-dimensional visualization of the interaction Fluid/Obstacle, visualization of the recirculation zone, velocity and pressure profiles. The study of the hydrodynamic effects of the obstacle on the flow consists in analyzing these processes in terms of zones of influences (upstream and downstream) in order to examine the three-dimensional structure of the free-surface flow around an obstacle
