Wave motion over a breakwater system of a horizontal plate and a vertical porous wall

H. Hu, K. H. Wang, A. N. Williams

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


A two-dimensional analytical solution is presented to study the reflection and transmission of linear water waves propagating past a submerged horizontal plate and through a vertical porous wall. The velocity potential in each fluid domain is formulated using three sets of orthogonal eigenfunctions and the unknown coefficients are determined from the matching conditions. Wave elevations and hydrodynamic forces acting on the porous wall are computed. Reflection and transmission coefficients are presented to examine the performance of the breakwater system. The present analytical solutions are found in fairly good agreement with the available laboratory data. The results indicate that the plate length, the porous-effect, the gap between plate and porous wall, and the submerged depth of the plate all show a significant influence on the reflected and transmitted wave fields. It is also interesting to note that the submerged plate plays an important role in reducing the transmitted wave height, especially for long incident waves.

Original languageEnglish
Pages (from-to)373-386
Number of pages14
JournalOcean Engineering
Issue number4
Publication statusPublished - 2001 Oct 30

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Ocean Engineering


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