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Based on linearized Navier-Stokes equations and Darcy’s equations, the viscous damping of small amplitude surface waves over a permeable bed is reexamined. Boundary layer approximation is employed in order to solve the velocity field and pressure field. Demanding that the net dissipation per period must be balanced by the slow decay of wave energy, the damping rate is found. The shortcomings of previous works are examined and are improved. Theory agrees fairly well with the experimental results.
Philip L.‐F. Liu (Sat,) studied this question.