Quantitative evaluation on the suitable flow region inside the shielding device of submersible aquaculture facility. (1st January 2023)

• Record Type: Journal Article
• Authors: Liu, Hang-Fei; Liu, Ying; Gui, Fukun; Sun, Haofeng; Zhao, Yun-Peng
• Is Part Of: Ocean engineering. Volume 267(2023)
• Publication Date: 2023-01-01
• Subjects: Suitable flow region -- Flow field -- Shielding device -- Swimming ability -- CFD method; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2022.113270
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: The primary purpose of the aquaculture facility is to provide a comfortable living environment and achieve welfare aquaculture for cultured fish in the open sea. Nevertheless, it has been a challenge to accurately assess the suitable flow region of the cultured fish inside the aquaculture facility for the severe ocean environment, which is a pressing concern for aquaculture farmers. First, the maximum domed swimming speed (MDSS) is used as an indicator to assess the swimming ability of Sciaenops ocellatus in this study, which can be measured through a vertical circulation water channel. Subsequently, the porous media theory is adopted and applied to predict the flow field inside the shielding device of the submersible aquaculture facility based on the shear stress transport k-omega turbulence model using the computational fluid dynamics (CFD) approach. In addition, combining the swimming ability of Sciaenops ocellatus and current speed distribution inside the shielding device of a submersible aquaculture facility, the suitable flow region is quantitatively assessed. The results indicate that when middle height, the inclined angle and net solidity are 0.4 m, 3π/12 and 0.65, respectively, the current speed inside the shielding device attenuates below the maximum domed swimming speed of Sciaenops ocellatus - 0.76 m/s and meets the survival of Sciaenops ocellatus for the actual sea condition with an incident current speed of 1.5 m/s. In addition, a suitable flow region for Sciaenops ocellatus, which is 204.512 m 3 and accounts for 17.76% of the total aquaculture volume, is formed and located inside the shielding device, close to the downstream sides, and gradually extends towards the middle of the shielding device. Based on the swimming ability of Sciaenops ocellatus, using numerical means to describe the suitable flow region in detail is to provide clear and macroscopic guidance for aquaculture farmers. Highlights: Quantitative evaluation on the suitable flow region inside the shielding device is carried out. The swimming ability of Sciaenops ocellatus is assessed through a vertical circulation water channel test. The flow field distribution inside the shielding dvice is predicted through CFD model based on porous media.