Abstract
Abstract In recent years, a significant number of compound slope dikes have been developed, but research on the over-wave flow of their viewing platforms remains relatively sparse. In this paper, isolated waves are selected to simulate storm surges. Numerical flumes are constructed based on OpenFOAM to explore the thickness and flow velocity of overtopping wave flow impacts and the thickness and flow velocity of backwash flow on viewing platforms on a compound slope dike with three different foreslope gradients. The study finds that both the impact thickness and return thickness of the cross-wave flow show a tendency to decay along the course, and the smaller the relative wave height is, the slower the impact thickness decays along the course, and the faster the return thickness decays along the course.
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