Numerical and experimental studies on a self-protected energy concentrator for water waves

Numerical Study of Nonlinear Effects on the Performance of the Self-Protected Energy Concentrator

“…Two wave probes are arranged at 1L and 3L from the wave generating boundary, respectively. The wave parameters used in this section are shown in Table 2, which are consistent with Zhang et al's experiment [20]. In Table 1, S = η 0 /L is wave steepness, η 0 is wave elevation, L is wave length, T is wave period.…”

“…11, x FOR PEER REVIEW 9 of 21 in Table 5, and three wave-steepness conditions in a sequency of S = 0.01, S = 0.02 and S = 0.04 are considered. [20]. It can be found that on the weather side, the results of CFD are in better agreement with the experimental data than the potential flow values, which indicates the importance of viscous effect in simulating the wave interaction with objects.…”

“…The self-protected energy concentrator (SPEC) [20] is a multi-cylinder array structure. To study the self-protection performance and concentration effects of the structure under nonlinear wave conditions, a series of numerical simulations were conducted based on the established numerical wave tank.…”

“…Afterwards, Newman [17,18] extended the cloaking phenomenon to deep water regions and proposed two types of cloaking devices, the outer cylindrical array and the outer circular ring. Zhang et al [19,20] proposed a self-protected energy concentrator (SPEC) with cylindrical array structure based on SCM. The performance of the SPEC has been experimentally and numerically studied, and its effectiveness has been proved, especially under linear wave conditions.…”

“…In this paper, the SPEC designed by Zhang et al [20] is taken as the research objective, and the commercial CFD solver STAR-CCM+ is employed to study the self-protection performance and concentration effects under nonlinear waves. The research contents are structured as follows: In Section 2, the numerical theory and the numerical model are presented.…”