Naslov
Development of wave dampers using computational fluid dynamics

Autori
Sviličić Šimun ; Rudan Smiljko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, prošireni sažetak, znanstveni

Izvornik
Proceedings 24th Numerical Towing Tank Symposium October 2022, Zagreb, Croatia / Perić Milovan ; Gatin Inno - Zagreb, 2022, 168-174

Skup
24th Numerical Towing Tank Symposium (NuTTS '22)

Mjesto i datum
Zagreb, Hrvatska, 16.10.2022. - 18.10.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
Wave dampers ; ICFD ; Waves ; FEM ; towing tank

Sažetak
Beach erosion is a natural process that can be manifested by completed over wash due to high tides and waves. To prevent this or minimize it’s effect due to waves, wave dampers are developed with different topology and position opposed to the free surface. Wave dampers are replacing effect of the beach steepness in order to dissipate wave kinetic energy and damp the amplitude of wave. In order to determine optimum position and topology, numerical simulations are used. Both wave damper and numerical beach are represented in the reduced scale, 1:20 to adequately represent future towing tank testing. Effect of different wave amplitudes on the result is also presented. Simulations are based on incompressible computational fluid dynamics (ICFD) which incorporates equations of motion defined by Navier-Stokes and continuity equation. The Navier- Stokes’s equations are used to compute two-phase incompressible flow, combining it with finite element method to discretize calculation domain. Turbulence is modelled while using LES sub-grid model where subgrid-scale represent the effect of the small-scale motion. Adaptive remeshing is incorporated around FSI to prevent divergence and to save calculation time while maintain highest possible accuracy. Solver use posteriori estimated error to compute new mesh size. Primary focus in the research is the interaction of the submerged wave damper on the fluid and it’s energy. Waves are modelled using Stokes’s wave theory based on steepness and wavelength. Finally, all of the results are shown in form of matrix which enables easier determination of wave dampers topology and position in terms of dissipation and reflection. Finally, LS-DYNA ICFD solver is compared with the finite volume solver Ansys Fluent

Izvorni jezik
Engleski

Znanstvena područja
Brodogradnja

POVEZANOST RADA