Unstructured Finite-Volume Model of Sediment Scouring Due to Wave Impact on Vertical Seawalls

The numerical modeling of sediment transport under wave impact is challenging because the complex nature triple wave–structure–sediment interaction. This study presents three-dimensional scouring due to non-breaking on a vertical seawall. Navier–Stokes–Exner equations are approximated calculate full evolution flow fields and morphodynamic responses. bed erosion model based van Rijn formulation with mass-conservative sand-slide algorithm. solution obtained by using projection method fully implicit second-order unstructured finite-volume in σ-coordinate computational domain. coordinate system employed accurately represent free-surface elevation sediment/water interface evolution. Experimental results velocity field, surface motion, scour hole formation used compare demonstrate proposed method’s capabilities seawall scour.