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Title: CFD解析を用いたエアレーションによる養殖水槽内の循環流と仔魚の挙動シミュレーション
Other Titles: Visualization of circular flow by aeration in an aquaculture tank and simulation of larval fish behavior using a CFD approach
Authors: Takahashi, Yuki Browse this author
Hashiba, Ryo Browse this author
Kotake, Genki Browse this author
Kimura, Nobuo Browse this author →KAKEN DB
Keywords: CFD解析
Issue Date: 2020
Publisher: 日本水産学会(Japanese Society of Fisheries Science)
Journal Title: 日本水産学会誌 Nippon suisan gakkaishi
Volume: 86
Issue: 4
Start Page: 302
End Page: 311
Publisher DOI: 10.2331/suisan.19-00039
Abstract: 本研究では,CFD解析を用いて,エアレーションによって発生する流場を可視化した。加えて,クロマグロ仔魚を遊泳力のない粒子と仮定し,運動方程式から水槽内の軌跡をシミュレーションした。仔魚は気泡周辺の上昇流に乗って水槽内を鉛直的に循環し,壁面付近の下降流から底面へと沈降した。このとき,孵化後3日目の仔魚は2.1-2.4 mm/s,9日目の仔魚は8.0-9.0 mm/sの浮上流で沈降を防除できることが示唆された。今後は,本手法を応用することで,効率的な養殖水槽設計が可能になると考える。
In this study, we proposed a simulation method for estimating the moving path-line of larval fish by the circular flow of aeration and discussed the relationship between the flow in an aquaculture tank and sinking death. First, computational fluid dynamics (CFD) analysis was conducted to visualize the flow in the aquaculture tank. Next, to simulate the moving path-line of larval fish of bluefin tuna Thunnus orientalis, the motion equation of the larval fish was solved. For the moving path-line simulation, the larval fish was assumed to be a non-swimming particle. The larval fish surfaced with the upstream flow by aeration, then sank to the bottom by downstream flow around the tank wall. To prevent this sinking, upstream flows of 2.1-2.4 mm/s and 8.0-9.0 mm/s were required for the larval fish of 3 and 9 days after hatching, respectively. Finally, we concluded that the proposed simulation method is useful for designing aquaculture tanks.
Type: article
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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