A numerical model for low-frequency harbor oscillation induced by wave group deformation

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A numerical model for low-frequency harbor oscillation induced by wave group deformation

The computation of nearshore low-frequency oscillation is essential in calculating harbor resonance, currents and topography change. A numerical model is proposed to calculate the 2D-H nearshore low-frequency oscillation. This model uses two equations, one is the long wave equation driven by time and space variation of radiation stress and another is the time-dependent mild-slope equation to calculate varying radiation stress by wave. The finite volume method is used to solve the long wave equation, which has advantage to treat low frequency wave run-up and shoreline move. Examples, low-frequency oscillation on the beach, around breakwaters and in harbor topography are conducted.

 

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