Wave Forces Due To Interaction of Water Wave with A Cylindrical Hollow Structure in Water of Finite Depth

M. Hassan¹ , P. Borah² , M. Viswakarma³

Section:Research Paper, Product Type: Isroset-Journal
Vol.6 , Issue.2 , pp.68-72, Apr-2019

CrossRef-DOI:   https://doi.org/10.26438/ijsrmss/v6i2.6872

Online published on Apr 30, 2019

Copyright © M. Hassan, P. Borah, M. Viswakarma . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
We consider a single floating hollow cylinder in water of finite depth and investigated associated diffraction problem due to interaction of water wave with hollow cylinderical structure. This device can be considered as wave energy device because a single hollow cylindrical structure represents a particular form of wave energy device (oscillating water column). We used the method of separation of variables to obtain the analytical expressions for the diffracted velocity potentials in clearly identified regions. By using the appropriate matching conditions along the virtual and physical boundaries between the regions, we obtained and then solved a system of linear equations for the unknown coefficients. We obtained wave forces which play a significant part for a floating structure. It is observed that the changes in radius and draft of the cylinder have significant effect on exciting forces. For higher range of frequencies, the exciting forces diminished and tends to zero. The values of exciting forces with various parameters are depicted graphically and compared with available results.

Key-Words / Index Term :
Diffraction, Wave force, finite depth, virtual boundary, frequency

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