Abstract
An investigation is undertaken into the hydrodynamic behaviour of a thick-walled fixed vertical Oscillating Water Column (OWC) in finite depth. This is facilitated through numerical modelling with the Boundary Element Method (BEM) code WAMIT and the use of this code is verified by comparison with an eigen-function expansion method by Mavrakos, specifically for this geometry. Comparisons of numerical predictions of pressure are made with measurements from a dedicated experimental programme. These validate the code and demonstrate the variation of hydrodynamic pressure in an OWC.