The deformation characteristics and flow field around knotless polyethylene netting based on fluid structure interaction (FSI) one-way coupling

Aquaculture and Fisheries

Shuchuang Dong¹  Liuxiong Xu²  Fuxiang Hu³  Baiqiang Zou⁴  Hao Tang⁴  Nyatchouba Nsangue Bruno Thierry⁴ 

[1] Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai, 201306, China;National Engineering Research Center for Oceanic Fisheries, Shanghai, 201306, PR China;The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Shanghai Ocean University, Ministry of Education, Shanghai, 201306, China;College of Marine Sciences, Shanghai Ocean University, Shanghai, 201306, PR China;

关键词: Knotless netting;    Fluid structure interaction;    Deformation characteristics;    Flow field;    SST k-omega model;   

DOI  :  

来源: DOAJ

【 摘 要 】

Knotless polyethylene (PE) netting is widely used in fisheries because of its excellent hydrodynamic performance and low cost. Netting deformation and the surrounding flow field distribution play an important role in determining the hydrodynamic characteristics of netting in moving water. In order to investigate the effect of solidity ratio and attack angle on drag, netting deformation, and flow field distribution through the netting, a fluid-structure interaction (FSI) model based on a one-way coupling combining the shear stress turbulent (SST) k-omega model and the large deformation nonlinear structural finite element model was evaluated. Our results showed the difference between the parallel and normal drag forces found in the present numerical model and experimental flume tank data were 9.17% and 11.58%, respectively. The mean relative error in the inclined hydrodynamic drag for different flow velocities and attack angles was 8.35%, 6.69%, and 5.37% for the nettings 1, 2, and 3, respectively. These results show that the present numerical simulation based on FSI one-way coupling can be used to examine hydrodynamic forces on netting. The flow simulation results show that there is a noticeable flow velocity decrease through the netting and a rather large velocity reduction region downstream from the netting for different attack angles. These results reveal the existence of turbulent flow due to the netting wake. It was found that the equivalent stress and total deformation increase as the flow velocity increases and solidity ratio decreases.

【 授权许可】

Unknown