Wave interaction with large roughness elements on an impermeable sloping bed

Bjarne Jensen, Erik Damgaard Christensen, B. Mutlu Sumer

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The present paper presents the results of an experimental and numerical investigation of the flow between large roughness elements on a steep sloping impermeable bed during wave action. The setup is designed to resemble a breakwater structure. The work is part of a study where the focus is on the details in the porous core flow and the armour layer flow i.e. the interaction between the two flow domains and the effect on the armour layer stability. In order to isolate the processes involved with the flow in the porous core the investigations are first carried out with a completely impermeable bed and successively repeated with a porous bed. In this paper the focus is on the impermeable bed. Results are obtained experimentally for flow and turbulence between the roughness elements on the sloping bed. Numerical simulations have
reproduced the experimental results with good agreements and can hereby add more details to the understanding of the fluid-structure interaction.
Original languageEnglish
Title of host publicationProceedings of the International Conference on Coastal Engineering 2012
Number of pages15
PublisherAmerican Society of Civil Engineers
Publication date2012
Publication statusPublished - 2012
EventICCE 2012: 33rd International Conference on Coastal Engineering - Santander, Spain
Duration: 1 Jul 20126 Jul 2012


ConferenceICCE 2012
Internet address


  • Fluid-structure interaction
  • Breakwaters
  • Model scale experiments
  • Numerical modelling

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