Coupled dynamics of the moving Antarctic krill trawl structure and its hydrodynamics behavior using various catch sizes and door spreads based on wavelet-based and Fourier analysis Because measurements were only performed for a specific inflow configuration using a 1/35 scaled midwater trawl model, it is expected that the amplitude of the trawl oscillations will be 35 times greater during fishing operations, resulting in a transverse motion of the order of a thirty-fifth of the trawl codend diameter. The drag force of the full-scale is approximately 6125 times that of the trawl model, and the velocity variations within and around the trawl are projected to be 7.79 times greater than the velocity fluctuations during the fishing operation. Our results can be used to improve and optimize the design of Antarctic krill trawl structures, as they suggest that trawl motions and transient interactions with turbulent flow velocity should be considered in numerical models.
Article
in Journal of Fluids and Structures
(January 2024)