This research deals with the experimental study of the hydrodynamic characteristics of Curved and Re-curved Caisson Breakwater. Due to an increase in coastal disasters, it is necessary to consider environmentally friendly breakwater types leading to minimal instability of adjoining shoreline. Hence Pile structure that leave lesser foot print on the ocean floor and not intercepting the free passage of littoral drift is preferred.
In this study, three different types of pile supported caisson breakwater models such as Vertical Pile Supported Caisson Breakwater (VPSCB), Quarter-Circle Pile Supported Caisson Breakwater (QPSCB), and Flaring Pile Supported Caisson Breakwater (FPSCB) are investigated. Experiments are conducted in 3D wave basin by varying the wave parameters for three different oblique wave attacks. The study reports the reflection coefficient, transmission coefficient, energy loss coefficient, non-dimensional pressure and non-dimensional run-up as a function of relative water depth & scattering parameter. The observations show QPSCB experiences better hydrodynamic performance characteristics than VPSCB under oblique waves however QPSCB experience larger run-up causing the waves to overtop easily. So, FPSCB which is a pile supported caisson breakwater with a re-curve front face is introduced to reduce the wave run-up. Thus, FPSCB performs better when compared to VPSCB and QPSCB.
The experimental results of VPSCB are compared with the numerical results from IITM RANS-3D and a good agreement is identified.