#5611. A large-eddy-simulation-based numerical wave tank for three-dimensional wave-structure interaction

August 2026publication date
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Engineering (all);
Computer Science (all);
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Abstract:
A three-dimensional numerical wave tank (NWT) based on the open-source large eddy simulation (LES) code Hydro3D is introduced. The code employs the level set and immersed boundary methods to enable accurate computations of the deformation of the water surface and to account for solid structures in the fluid domain, respectively. The spatially-filtered Navier–Stokes (N–S) equations are solved on a staggered Cartesian grid using the finite difference method while time advancement is achieved using the fractional-step method based with a three-step Runge–Kutta scheme. Velocities and pressure are coupled with the Poisson equation and its solution is obtained via a multi-grid technique. The code is then applied to predict the progression and damping of monochromatic waves and the interaction of non-linear waves with various submerged obstacles.
Keywords:
Immersed boundary method; LES; Level set method; Non-linear waves; Numerical wave tank; Turbulence; Wave-structure interaction

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