Wave‐Induced Longshore Currents in Surf Zone

Abstract

This paper presents the numerical model of longshore currents driven by irregular waves in the surf zone. The wave field is described using the wave number vector equations and the energy‐conservation equation with a superposition technique for the description of irregular waves, while the current field is described using the momentum‐conservation equations and the continuity equation. Particular care has been given to the bed friction on a movable bed and the mixing processes possibly caused by both turbulence and shear flow dispersion. The model was applied to a field situation of irregular waves on a uniform beach.