An experimental and numerical study of hydrodynamic characteristics of submerged flexible plane nets in waves

Experimental and numerical investigation on the damping effect of net cages in waves

“…6, the transmission coefficients downstream from different net-cage models present a similar tendency in different wave heights. The inertial force on a fishing net is far smaller than the drag force in waves according to our previous study (Zhao et al, 2008). Therefore, the main damping mechanism when water wave propagating through fishing nets is viscous loss due to quadratic drag.…”

The dynamic simulation of the pelagic longline deployment

“…Balash et al (2009) proposed C m of netting twine was much larger compared with that of the cylinder because the diameter of netting twine was small. Zhao et al (2008) found the influence of additional mass force was small, and the additional mass force could be ignored in the numerical simulation. Liu et al (2012) found that the value of Lumped mass method can be used to obtain the corresponding differential equations by the dynamic equation and initial value of each node.…”

Experimental Investigation on Hydrodynamic Coefficients of a Column-Stabilized Fish Cage in Waves

“…The effect of KC number on C M was insignificant for the jacket, but the effect of wave incident angle was distinct; C M got the maximum value in forward wave (β = 0 • ), and the minimum value in lateral wave (β = 90 • ). For M2, it was considered that the jacket and the netting were two independent parts; that is, the horizontal wave force of the netting can be obtained by the force of M2 minus the force of M1, and the composition of the horizontal wave force of the netting was based on the study of Zhao et al [24], whom conducted wave tests on a variety of densities of netting, and concluded that the value of the inertial force of the netting was much smaller than the value of the wave force it received, can be ignored. Therefore, it was considered that the horizontal wave force of the netting can be expressed by only the drag force.…”