Negative Effective Gravity in Water Waves by Periodic Resonator Arrays

TitleNegative Effective Gravity in Water Waves by Periodic Resonator Arrays
Publication TypeJournal Article
Year of Publication2011
AuthorsHu XH, Chan CT, Ho KM, Zi J
Journal TitlePhysical Review Letters
Date Published04/27
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberISI:000290099500001

Based on analytic derivations and numerical simulations, we show that near a low resonant frequency water waves cannot propagate through a periodic array of resonators (bottom-mounted split tubes) as if water has a negative effective gravitational acceleration g(e) and positive effective depth h(e). This gives rise to a low-frequency resonant band gap in which water waves can be strongly reflected by the resonator array. For a damping resonator array, the resonant gap can also dramatically modify the absorption efficiency of water waves. The results provide a mechanism to block water waves and should find applications in ocean wave energy extraction.

URL<Go to ISI>://000290099500001
Alternate JournalPhys. Rev. Lett.