Abstract
A Directional Hybrid Wave Model (DHWM) developed recently is able to deterministically predict a directional wave field based on at least three fixed-point wave records. In this study, it was extended to consider the Doppler effects of steady and uniform currents on a directional wave field. The extended DHWM was then used to analyze three cases of field measurements recording directional waves in the presence of currents selected from the WACSIS (Wave Crest Sensor Inter-comparison Study) database. The comparison between the corresponding results of wave decomposition obtained, respectively, using the original DHWM and extended DHWM shows the advantages of using the latter. The superiority of the latter mainly originates from the use of the intrinsic frequency instead of the apparent frequency to determine the corresponding wavenumber and transfer functions relating wave pressure and velocities to elevation.
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