Two different initial slopes were considered, a 1:10 slope and a 1:20 slope, in order to obtain varying breaking-wave conditions (Iribarren number).Ī wide range of high resolution instruments were deployed in the wave flume allowing detailed measurements of hydrodynamics and sediment concentrations. The bed profile consisted of a raised 20m long horizontal test section which on the offshore side was flanked by a slope from the flume floor and on the onshore side continued in a rigid parabolic shaped dissipative beach to absorb incoming waves (see figure below). The objective of this experiment was to measure the hydrodynamics and sediment transport processes under 1) irregular non-breaking waves and 2) under regular breaking waves. This experiment (co-funded by EU-FP7 Hydralab IV) took place from November 2013 until January 2014. Vertical positioning is achieved through a spindle screw, allowing the frame to be positioned over a 1.4 m vertical range with an accuracy of 1mm. Attached to the trolley the frame can be positioned at any cross-shore location along the flume. The frame was designed and manufactured at the University of Twente, from where it was transported in parts to UPC in Barcelona where it was assembled and attached to the flume’s existing measurement carriage (see figures on the left). Due to the absence of the mobile sands, optical instrumentation can be used to measure the hydrodynamics (Particle Image Velocimetry, Laser Doppler Anemometry).Ī new mobile measurement frame was purpose-built for the SINBAD experiments. Rigidizing the bed allows for controlled and systematic measurements of the hydrodynamics under breaking waves.
For the third measurement campaign (Sep-Oct 2014) the bed profile in the flume will be made rigid by constructing a layer of reinforced concrete on top of the sand bed. The first campaigns (co-funded by EU-FP7 Hydralab IV) took place in Nov-Dec 2013 and the second campaign will take place in May-June 2014. In the first two campaigns a mobile sediment bed will be placed in the flume and the measurements will focus on the hydrodynamics and sediment processes under regular breaking and irregular non-breaking waves. The experiments in the CIEM wave flume consist of three separate measurement campaigns, each of 8 week duration. The CIEM wave flume of the Maritime Engineering Laboratory at the Catalonia University of Technology is 100m long, 3m wide and 5m deep.
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