Publications

Rezanejad, K., Bhattacharjee, J. and Guedes Soares, C. (2015), “Analytical and numerical study of dual-chamber oscillating water columns on stepped bottom”, Renewable Energy, Vol. 75, pp. 272-282

The present study analyses the effect of implementing dual-chamber oscillating water column (OWC) device placed over stepped sea bottom on the efficiency of the device. The mathematical problem is formulated in the two dimensional Cartesian coordinate system under the linear water wave theory. Two different mathematical approaches are adopted to solve the associated boundary value problem (BVP), one is the method of matched eigenfunction expansion and the other is the boundary integral equation method (BIEM). The numerical results show good agreement with the analytical results. The performance of the proposed device is analysed and eventually compared with the typical single chamber OWCs with/without step and with dual-chamber OWCs over uniform bottom profile. Present investigation illustrates that by considering dual-chamber OWC device on the stepped sea bottom the performance of the device can be improved significantly in various sea state conditions.

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