eng Science and Education Publishing American Journal of Mechanical Engineering 2328-4110 2020-09-16 8 3 88 105 10.12691/ajme-8-3-1 AJME2020831 article Frimpong Opoku 1 Michael Atkinson mdatkinson@ncat.edu 1 Mohammad Nasim Uddin 1 Mechanical Engineering, North Carolina A&T State University, Greensboro, USA In this study, a Numerical Wave Tank (NWT) was used to investigate the flowfield of an offshore Oscillating Water Column (OWC). An inviscid solution coupled to the Volume of Fluid method was carried out using ANSYSTM Fluent to simulate six different offshore OWC configurations. The waterside chamber angle, ¦È1, shoreside chamber angle, ¦È2, and immersion extension depth d, were varied to evaluate their effect on pneumatic power and efficiency. It was determined that configuration parameters with ¦È1 = 45o, ¦È2 = 90o and d = 0 m produced the highest power with an efficiency of 23.1%; results showed that this case had a higher static pressure inside the duct which was the predominant reason for a higher pneumatic power. The cases with an additional extension into the water, d, was found to reduce the pneumatic power when compared to a similar case without an extension. http://pubs.sciepub.com/ajme/8/3/1/ajme-8-3-1.pdf offshore oscillating water column numerical wave tank pneumatic power volume of fluid inviscid flow