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due to changes in biogeochemical cycling and light penetration. In addition to the direct effect on benthic habitats, sediment erosion by mooring lines will effect a whole range of ecosystem processes, e.g. In regular waves of 6 m height and 8 s period, the area of benthic habitats adversely affected by the mooring lines may exceed 60 m 2. The results show that the area of benthic habitats adversely affected by the leading mooring line on a typical wave energy converter (WEC) monotonically increases with the increase in wave height.
#Orcaflex coordinate conversion series#
The output from OrcaFlex is then imported to Matlab, where the affected area is calculated using the time series of coordinates of touch down points of the mooring lines. If you do not know the original axis convention of the 3D model, or if the default transformation applied by OrcaFlex seems incorrect, then the shaded graphics. An OrcaFlex model is used to assess the scouring effect on bottom sediments and consequent disruption of benthic habitats, and open water tests are being conducted to compare the model performance with the actual observations. OrcaFlex assumes that DirectX models have a left-handed coordinate convention (with the z-axis positive into the screen, and the x and y axes in the plane of the screen), and on import applies a transformation to reorient the model to the OrcaFlex coordinate system that also converts the model from left to right-handed drawing axes. This paper presents the research carried out in the marine renewables group of Heriot-Watt University, where the physical models of wave energy converters are first tested in the wave basin, and the results of their behaviour are then compared to the simulations performed using mathematical modelling.