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Abstract:
The present paper investigates the hydrodynamic performance of the Vortex-Induced Motion Energy Converter (VIMEC) oscillator modeled in OpenFOAM computational fluid dynamics (CFD) framework. The model employs an overset (chimera) grid approach to allow time-domain simulations with large body displacements and complex motion patterns.
A series of sensitivity and validation studies is performed to assess the model's accuracy in predicting the Vortex-Induced Vibration (VIV) and galloping responses for two setups: (i) a canonical case of circular cylinder, (ii) and the VIMEC oscillator. The numerical model is validated against well-established experimental data for two flow regimes: laminar flow regime (Re = 200) and subcritical flow regime (Re = 3.66 ×10^4 to 1.74 ×10^5) in which the Unsteady Reynolds Averaged Navier-Stokes (URANS) turbulence model is employed.
The study compares the predicted motion characteristics of the VIMEC oscillator with experimental measurements gathered during the VIMEC test campaign conducted at SINTEF Ocean. The CFD model is employed to explore the relationship between fluid flow, structural dynamics, and their combined impact on hydrodynamic force generation. This study enhances our understanding of VIMEC oscillator behavior and contributes to the development of more efficient renewable energy systems harnessing vortex-induced motion.
Keywords: Vortex-induced motion energy converter, computational fluid dynamics, vortex-induced vibration.
| Conference Topic Areas | Track2: Advanced Computational Methods and Applications in Marine, Subsea and Offshore Technology |
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