Session: 08-06-01 non-presentations

Paper Number: 129855

129855 - A Unified Numerical Tool for Integrated Wind-Wave-Current-Structure Interaction Simulations 

This work presents advancements in our fully nonlinear near- and far-field coupling numerical model designed for marine and offshore simulations. A new wind-wave interaction module has been incorporated into the far-field Higher-Order Spectral (HOS) solver, enabling sophisticated nonlinear modeling of wind-wave-current interactions. To address potential numerical instabilities arising from the wind effect, both Tian's wave breaking model and a Savitzky-Golay filter are employed to account for energy dissipation due to wave breaking.

The resulting near- and far-field coupling solver provides engineers with an integrated numerical tool for conducting unified simulations of wind-wave-current-structure interactions. This novel tool offers several advantages over traditional numerical approaches. Firstly, it demonstrates enhanced efficiency as the GPU-accelerated HOS solver handles wave propagation in the large far field, while the expensive viscous Computational Fluid Dynamics (CFD) simulation for fluid-structure interaction (FSI) is confined to a smaller near field, significantly reducing CPU time. Secondly, it enables on-site CFD simulations for a specific structure in a chosen ocean location. Thirdly, it provides engineers with flexibility to freely modify the location or number of structures by relocating, inserting, or removing near fields containing structures.

As a demonstration, we simulate two moored floating offshore wind turbines (FOWTs) placed in different locations within a large wave field. The tool is employed to study wind and wake effects in detail.

Presenting Author: Xin Lu Institute of High Performance Computing (IHPC)

Presenting Author Biography: Dr. Lu Xin is a Principle Scientist in the Institute of High Performance Computing (IHPC), a research institute under the ASTAR of Singapore. His current main research fields include FSI in multiphase flows and parallel & GPU computing.

Authors:

Xin Lu Institute of High Performance Computing (IHPC)
My Ha Dao Institute of High Performance Computing (IHPC)