3-DIMENSIONAL COMPUTATION OF FLOW AROUND GROYNE

The three-dimensional (3D) numerical simulation of a steady, shallow t urbulent flow around a groyne in a rectangular channel is presented. A method used to track a moving surface boundary and to follow its evol ution, using a one-phase 3D Reynolds solver with rigid grids, by means of a transient fraction of fluid or ''porosity'' field is applied. So me results are compared with experimental data, such as the isolines o f water depths and the mean velocity field. A comparison of the reatta chment length prediction using the free-surface model and the rigid-li d assumption is given. Other results concerning the pressure field, tu rbulence, or shear stress distribution are presented and analyzed.