Volume loss of an aquaculture net pen due to current speed and linear weight of sinker ring

Abstract

ABSTRACT. The internal volume of aquaculture net pens is an important variable to fish comfort during the culture process. In this research, a module of net pens was modelled using the finite element (FE) software AquaSim®. The net pens deformation was analyzed under different current speeds (0.25, 0.50 and 0.75 m s ). It was found that under the most severe condition, that is, the highest current speed and the lowest linear weight of the sinker ring (0.75 m s -1 and 25 kg m -1 , respectively), the volume loss with respect to initial undeformed net pen volume reached a maximum value of 53%. This occurred in the net pen firstly exposed to currents. Based on modeling results, a relationship between net pen volume loss due to the combined effects of both water current speed and linear weights of the sinker rings is proposed. Key words: net pen deformation, current speed, sinker ring, Chile. , respectivamente), la pérdida de volumen de la primera jaula del módulo alcanzó 53%. A partir de los resultados obtenidos en los modelos, se determinó una función que relaciona la pérdida de volumen de la jaula con la velocidad de corriente y el peso lineal del anillo cortacorrientes. Palabras clave: deformación de la jaula, velocidad de corriente, anillo cortacorriente, Chile.

Stress analysis of a submersible longline culture system through dynamic simulation

“…Trondheim, Norway), based on FEM. This program performs a comprehensive analysis of the interactions of transmission forces between rigid and flexible components, in addition to calculating the local forces and stresses on each component, providing results such as the displacement, acceleration and deformation of the system (López et al, 2015).…”

Numerical Study of a Single-Point Mooring Gravity Fish Cage With Different Deformation-Suppression Methods

“…For the other cage deformation, several attempts have been made to improve the fish cage deformation and minimize the volume reduction. According to previous researches [4,5], increasing the sinker weight can improve the cultivation volume to a certain degree. Huang et al [6] used a numerical method to investigate the effect of an SPM fish cage system with a rigid frontal frame.…”