2D WAVE FLUME
The wave flume of the EUMER is equipped with technology for generating regular and random waves. The flume is 45.0 m long, 1.4 m wide and has a maximum working depth of 1.5 m. The piston type wave paddle is equipped with active wave-absorbing systems to reduce the effect of reflected waves within the flume and can generate random sea states to any required spectral form, e.g., JONSWAP, Pierson-Moskowitz, or user defined. Second order wave effects, including long waves and set-down, are realistically represented. The flume is equipped with a series of glass windows, covering most of the flume length on one side. These windows provide visibility into the test section, allowing for the recording of wave/structure interactions. At the end of the flume there is a parabolic absorption device specifically designed to absorb the incident waves.
2D WAVE GENERATION
Wave generation is controlled through HR-Merlin, a software that can generate sinusoidal regular waves, random waves and solitary waves. The parameters to configure include project scale tank, water depth and the random number seed (used in random waves). The flume water depth is used in transfer function calculation, shallow water corrections and overtopping calculations. Additionally, it is used in the calibration routines of wave probes necessary for active absorption. The spectral shape can be selected from the predefined sea states or a user-defined. The following predefined wave spectra are included in HR Merlin: - JONSWAP (defined by wind speed or Hs); - Pierson-Moskowitz; - International Towing Tank Congress (ITTC) wave spectrum; - Darbyshire Coastal wave spectrum; - Darbyshire Ocean wave spectrum; - Neumann wave spectrum; - BTTP wave spectrum; - Bretschneider wave spectrum; - Pink (Top-Hat). The spectra can also be corrected for shallow water effects in the software. The random seed used in irregular wave generation is a pseudo random sequence of numbers i.e. it is repeatable if the same seed is used. By changing the seed the sequence can be changed to produce a different time series with nominally the same frequency spectra. It is also possible to import time series of paddle displacement. The software will calculate the associated spectral wave height using the selected transfer function. In the wave flume can be generated regular waves with heights of up to 0.70 meters and periods of 2.3 seconds, as well as irregular waves with significant wave heights up to 0.35 meters and peak periods of 2.4 seconds, in water depths of up to 1.5 meters.
2D WAVE FLUME
The wave flume of the EUMER is equipped with technology for generating regular and random waves. The flume is 45.0 m long, 1.4 m wide and has a maximum working depth of 1.5 m. The piston type wave paddle is equipped with active wave-absorbing systems to reduce the effect of reflected waves within the flume and can generate random sea states to any required spectral form, e.g., JONSWAP, Pierson- Moskowitz, or user defined. Second order wave effects, including long waves and set-down, are realistically represented. The flume is equipped with a series of glass windows, covering most of the flume length on one side. These windows provide visibility into the test section, allowing for the recording of wave/structure interactions. At the end of the flume there is a parabolic absorption device specifically designed to absorb the incident waves.
2D WAVE GENERATION
Wave generation is controlled through HR- Merlin, a software that can generate sinusoidal regular waves, random waves and solitary waves. The parameters to configure include project scale tank, water depth and the random number seed (used in random waves). The flume water depth is used in transfer function calculation, shallow water corrections and overtopping calculations. Additionally, it is used in the calibration routines of wave probes necessary for active absorption. The spectral shape can be selected from the predefined sea states or a user-defined. The following predefined wave spectra are included in HR Merlin: - JONSWAP (defined by wind speed or Hs); - Pierson-Moskowitz; - International Towing Tank Congress (ITTC) wave spectrum; - Darbyshire Coastal wave spectrum; - Darbyshire Ocean wave spectrum; - Neumann wave spectrum; - BTTP wave spectrum; - Bretschneider wave spectrum; - Pink (Top-Hat). The spectra can also be corrected for shallow water effects in the software. The random seed used in irregular wave generation is a pseudo random sequence of numbers i.e. it is repeatable if the same seed is used. By changing the seed the sequence can be changed to produce a different time series with nominally the same frequency spectra. It is also possible to import time series of paddle displacement. The software will calculate the associated spectral wave height using the selected transfer function. In the wave flume can be generated regular waves with heights of up to 0.70 meters and periods of 2.3 seconds, as well as irregular waves with significant wave heights up to 0.35 meters and peak periods of 2.4 seconds, in water depths of up to 1.5 meters.
