Description
Computational Assessment of Bottom-Fixed Offshore Wind Turbine in Nonlinear Ocean Wave RegimesTwo experimental and numerical models are developed in this study to analyse the two-phase flow due to the interaction of regular and irregular wave regimes with a bottom-fixed monopile. The developed three-dimensional numerical model takes advantage of an implicit finite volume solver of the Reynolds Average Navier- Stokes (RANS) equation to calculate the two-phase flow due to the presence of the solid structure in progressive waves using the volume of fluid method. The model is employed to consider the flow vorticity. The experimental model is established to record wave loads and kinematics of the free surface flow around the monopile. A load cell is embedded at the touchpoint of the monopile and tank’s bottom to record the time history of the shear force and bending moment due to exciting wave loads. A wide range of nonlinear regular waves is chosen to interact with the monopile, and these wave characteristics are selected from a near breaking wave to a weakly nonlinear wave. The calibration of the physical model and the convergence test of the numerical model for different mesh sizes are conducted and the numerical results are compared with the experimental data to evaluate the accuracy of the simulations. The spectral analysis is conducted to determine the nonlinearities of the shear force and the bending moment for various sea states. Moreover, the diffraction and the viscous effects on the nonlinearities are then evaluated for different sea states.
| Period | 01 Feb 2024 → 01 Feb 2025 |
|---|---|
| Visitor degree | PhD |
| Degree of Recognition | International |