The aim of this collaborative study is to implement a frequency domain model for an array of Oscillating Water Columns (OWC). The model will be built using the Boundary Element Method (BEM) code WAMIT. The model will be validated against experimental data obtained from laboratory testing of an array of three OWC devices at a 1:50 scale. The collaboration is intended to develop a knowledge exchange between David (numerical modelling) and Davide (physical modelling). The study aims to identify the changes in the incoming wave field due to the presence of the array. The experimental setup will comprise three or more similarly tuned devices to assess the change in the radiation flow of the array and establish how each component of the array can be improved. Subsequently, this study will be extended to devices which are tuned differently to one another. The use of surface Particle Image Velocimetry (PIV) will allow the incident flow to be compared with the response flow of the array. Numerical modelling in the frequency domain employs linearised equations to solve the velocity flow problem, whilst the nature of the phenomena in the experimental work is strongly affected by non-linearities. The data from the experimental and numerical work will be compared and used to determine how well linear wave theory approximates real behaviour of the array.
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- Davide Magagna and David Carr
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