Mastering the Science behind H-HOPE: Vortex-Induced Vibrations

Mastering the Science behind H-HOPE: Vortex-Induced Vibrations

H-HOPE lecture series introduces our first video on an introduction to fluid dynamics modelling, discussing the differences between laminar and turbulent flow, and the role of the Reynolds number in determining the flow regime.

Francesco De Vanna from the University of Padova discusses the complexities of fluid dynamics modelling, the role of Reynolds number, and the concept of Vortex-Induced Vibration (VIV) as a means to harvest energy from water sources. It highlights the importance of non-dimensional parameters, such as reduced velocity and Strouhal number, in understanding and modelling the dynamics of oscillating bluff bodies.

Our first online lecture in this series emphasises the challenges in capturing the low-frequency dynamics of VIV systems and the need for extensive simulations or experiments to develop a comprehensive database for design purposes.

🔍 We explain the concept of Reynolds-Averaged Navier-Stokes (RANS) equations and the challenges in modelling the complex turbulent structures in a flow field, leading to the introduction of the turbulent viscosity concept.

🔍 The importance of non-dimensional parameters, such as reduced velocity and Strouhal number, in understanding the dynamics of oscillating bluff bodies and the phenomenon of Vortex-Induced Vibration (VIV).

Various parameters, including density ratio, stiffness, and damping, in the VIV system and their impact on the efficiency and performance of the device. There is a need for extensive simulations or experiments to develop a comprehensive database for the design of VIV systems, as the low-frequency dynamics of these systems require long time windows to capture accurately.

The full lecture can be found in the video below and on the following link: https://www.youtube.com/watch?v=0VvEYt7iqjc

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