Jet-wall interaction in shallow waters

In this work some numerical simulations and experiments, carried out to investigate jet-wall interaction in shallow waters, are described and discussed. Basically, the work aims at the environmental effects of marine structures, e.g. the modifications of the hydrodynamic field due to the interaction of river runoff with a shallow, coastal water body, in the presence of marine structures. Stratification effects are neglected and the focus is on barotropic features, e.g. the interactions between the flow from the river and harbour structures. The numerical analysis was carried out by the classic depth-averaged shallow water equations, and the numerical solution of the discrete problem was achieved by a finite difference method. The experiments were performed in a shallow water tank, obtaining the flow field by PIV. The results point up the importance of the Coanda. effect in this framework. The comparison between the numerical solutions and the experimental data shows a meaningful agreement.