Numerical Investigations on Different Shapes of Offshore Fish Cages Subjected to Regular Waves

Abstract

The global population is increasing and the demand for seafood is also growing. Since the capture production is becoming unsustainable, aquaculture production has to meet the requirements of sea food demand. The primary production is coming from the nearshore cage system in developing countries. The aquaculture industry is now keen to establish a sophisticated infrastructure in offshore, due to better water quality and higher production capacity. The present study describes about different shapes of offshore cages, such as square, circular, hexagon and octagon subjected to regular waves. The frequency and time domain analysis are carried out for each cage using ANSYS AQWA. The added mass, radiation potential damping and response amplitude operators are studied for free floating conditions. The circular cage obtained highest added mass in both heave and pitch and hexagon cage obtained highest radiation damping. Octagon cage obtained highest RAOs in both frequency domain and time domain analysis and highest mooring line tension. The hexagon cage is better performing in all the wave conditions considered. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.