LAUSR

Abstract A multiphase flow model based on the Navier–Stokes equations using a constrained interpolation profile based Cartesian grid method is applied to estimate the wave interaction with a submerged breakwater. The free surface is captured by the Tangent of Hyperbola for Interface Capturing scheme. Wave transformations around submerged breakwaters are simulated with this model. Two kinds of waves (regular wave and solitary wave) and two shapes of submerged structures (rectangle and trapezoid) are investigated to verify the ability of the presented wave model to simulate the flow characteristics in these wave-structure interaction problems. Comparisons with experimental results show good agreements. It is demonstrated that the numerical wave model with the constrained interpolation profile method can reproduce the nonlinear flow phenomena and capture the complex free surface of wave transformation around submerged breakwaters accurately.