Eirini Katsidoniotaki

• Doctor of Philosophy
• Postdoctoral Fellow at MIT at Massachusetts Institute of Technology

Aquaculture is a marine industry experiencing significant growth and an important seafood provider. Underwater vehicles such as remotely operated vehicles (ROVs) are commonly used for inspection and maintenance of the net pens where the fish are grown. These net pens are flexible structures whose position and shape change with ocean currents and wa...

In wave energy farms, accurately determining the motion of each wave energy converter is essential for performance evaluation, estimating energy production, and implementing effective control strategies. The primary challenge lies in the real sea environment, where the complex nonlinear hydrodynamic phenomena make it difficult to estimate the motio...

As the global population grows and climate change intensifies, sustainable food production is critical. Marine aquaculture offers a viable solution, providing a sustainable protein source. However, the industry's expansion requires novel technologies for remote management and autonomous operations. Digital twin technology can advance the aquacultur...

Accurately determining hydrodynamic force statistics is crucial for designing offshore engineering structures, including offshore wind turbine foundations, due to the significant impact of nonlinear wave–structure interactions. However, obtaining precise load statistics often involves computationally intensive simulations. Furthermore, the estimati...

For many design applications in offshore engineering, including offshore wind turbine foundations, engineers need accurate statistics for kinematic and dynamic quantities, such as hydrodynamic forces, whose statistics depend on the stochastic sea surface elevation. Nonlinear phenomena in the wave–structure interaction require high-fidelity simulati...

Emerging offshore renewable energy technologies are expected to become an important part of the future energy system, and reliability for these new technologies in different metocean scenarios must be guaranteed. This poses a challenge in extreme weather scenarios like storms, in particular for less mature technologies such as wave energy. Not only...

In this work, a closely spaced dual turbine concept is studied. The distance between the two side‐by‐side hubs is 1.05D, where D is the rotor diameter. This configuration has a potential benefit for offshore wind developments in which power density can be maximized. The main goal is to evaluate the overall aerodynamic performance, blade loads, and...

Wave energy conversion is a renewable energy technology with a promising potential. Although it has been developed for more than 200 years, the technology is still far from mature. The survivability in extreme weather conditions is a key parameter halting its development. We present here results from two weeks of measurement with a force measuremen...

Wave energy is a renewable energy source with the potential to contribute to the global electricity demand, but a remaining challenge is the survivability of the wave energy converters in harsh offshore conditions. To understand the system dynamics and improve the reliability, experimental and numerical studies are usually conducted. However, these...

In the preliminary design stage of a waveenergy converter (WEC), researchers need fast and reliablesimulation tools. High-fidelity numerical models are usu-ally employed to study the wave-structure interaction, butthe computational cost is demanding. As an alternative,midfidelity models can provide simulations in the order ofreal time. In this study,...

Extreme waves are critical for the WEC's development. CFD toolboxes have been widely used in the simulation of extreme waves-structure interaction. However, the quality of the mesh is a sensitive issue; the WEC's large response can lead to mesh deformation and subsequent numerical instability. In this paper, 100-year extreme waves are chosen from t...

In the preliminary design stage of a wave energy converter (WEC), fast and reliable simulation tools are required. High-fidelity numerical models are usually employed to study the wave-structure interaction, yet the computational cost is demanding. Instead, mid-fidelity models provide simulations in the order of real time. In this study, Uppsala Un...

This work evaluates the survivability of a point-absorbing wave energy converter at sea states along and inside the 50-year environmental contour for a selected-site in North Sea, by utilizing CFD simulations. Focused wave groups based on NewWave theory are used to model the extreme waves. The numerical breaking waves have been previously predicted...

At the stage of design load analysis for offshore installations such as wave energy systems, a critical step is the determination of environmental cases to be evaluated for the definition of the characteristic design load. A commonly used methodology for load case selection, applied in multiple studies and recommended by technical specifications an...

One of the big challenges for offshore wave energy systems is how to guarantee the surviv-ability in harsh environmental conditions. Nonlinear and complex phenomena in steep and high amplitude waves can be captured by CFD methods. Mesh morphing is the most common used dynamic mesh method, yet the high and steep waves are a challenge since the large...

Accurate modeling and prediction of extreme loads for survivability is of crucial importance if wave energy is to become commercially viable. The fundamental differences in scale and dynamics from traditional offshore structures, as well as the fact that wave energy has not converged around one or a few technologies, implies that it is still an ope...

This work presents a numerical study of the aerodynamic performance and the resulting flow field of two novel Savonius wind turbines with twisted blades. The novelty relies on the blade manufacturing process which is characterized by a `twisted cut’ through the central axis of a hollow cylinder (tube), followed by a partial twisted cut in the range...