Advanced Computational Modeling Of Wave Energy Converters And Fluid-Structure Interaction: A Smoothed Particle Hydrodynamics Approach

Official URL: https://risc01.sabanciuniv.edu/record=b3205853

Computational fluid dynamics (CFD) has emerged as a powerful tool for analyzing and simulating complex fluid flow phenomena in various real-life and industrial applications. This thesis focuses on advancing the computational modeling of wave energy converters (WECs) and fluid-structure interaction (FSI) problems using the smoothed particle hydrodynamics (SPH) method, a mesh-free numerical approach renowned for its ability to address the inherent complexities and non-linearities of such physical processes. The primary objective of this research is to enhance the capabilities of the SPH method in modeling and simulating three distinct types of energy converters: Oscillating Wave Energy Converters (OWECs), Overtopping-type Wave Energy Converter devices, and Point Absorber Converter systems. By harnessing the accuracy and flexibility of the SPH method, this study aims to achieve a comprehensive understanding of the hydrodynamic behavior of these devices, providing valuable insights into their performance and optimization. To initiate the investigation, a crucial step involves modeling regular and irregular waves in a numerical wave flume, serving as the foundation for generating realistic wave conditions for subsequent WEC modeling. By meticulously reproducing wave characteristics, including height, period, and wave orbital velocities, the reliability and fidelity of the numerical simulations are ensured. Subsequently, the SPH method is employed to model the wave energy converter devices, enabling the precise capture of the intricate interactions between the devices and the waves. Through this modeling approach, a rigorous analysis and evaluation of the hydrodynamic performance and energy conversion efficiency of the converters can be conducted. Furthermore, this thesis delves into the investigation of fluid-structure interaction (FSI) problems utilizing the SPH method. This entails the modeling and simulation of the dynamic interaction between fluid flows and various structures, accounting for significant factors such as fluid-induced forces and the resulting motion of solid objects. By examining FSI problems, this research aims to deepen the understanding of the behavior and performance of structures operating within dynamic fluid environments. The research methodology involves the implementation and refinement of the SPH method to ensure the accurate simulation of wave energy converter systems and fluid-structure interaction problems. The credibility and validity of the developed numerical models and simulations will be assessed through rigorous comparisons with experimental data and existing theoretical results documented in the literature. The outcomes of this research are anticipated to make substantial contributions to the field of computational modeling in wave energy converters and fluid-structure interaction. By leveraging the SPH method, this study will offer valuable insights into the performance and optimization of oscillating wave energy converters, overtopping wave energy converters, and point absorber converter systems. Additionally, the investigation of fluid-structure interaction problems will enhance the understanding of the dynamic behavior and response of structures subjected to fluid flows. Ultimately, this research endeavors to drive advancements in the design and operation of wave energy converters, promoting the sustainable utilization of wave energy resources.