Mechanical Balance to Form Flow Structures in a Run-Up Wave

Abstract

This paper presents fundamental features of flow structures and shear distributions in run-up waves on uniform slopes on the basis of experimental image experiments. It was found that there were high velocity gradients near the bottom and surface boundaries within the thin run-up water layer, resulting in multiple shear layers. The local flow structure in the run-up waves depends on the local surface gradient and shear distributions. Typical features of the boundary layer flows during run-up process are also discussed in this paper.