首页|An MRF Model-based Study on the Effect of Fishes upon the Characteristics of Flow Field of an Aquaculture Tank

An MRF Model-based Study on the Effect of Fishes upon the Characteristics of Flow Field of an Aquaculture Tank

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  • NETL
  • NSTL
  • Natl Taiwan Ocean Univ
The study aims to investigate the effect of fish movement on the flow field in the aquaculture tank of a recirculatingwater aquaculture system. Herein, based on the NaviereStokes equations and the RNG k-e turbulence model, the flowfield in the aquaculture tank with fish movement was numerically simulated using the multiple reference frame (MRF)model and compared with the numerical simulation results of the fishless aquaculture tank. The results revealed that theoverall mean flow velocity in the tank decreased significantly when the fish swam counter-currently with a fixed trajectory,and the overall mean flow velocity increased slightly when the number of fish increased. When the same numberof fish swam counter-currently with a fixed trajectory, the effect of side-by-side distribution on the overall mean flowvelocity in the tank was slightly greater than that of the back-and-forth and top-and-bottom distributions. Under theinfluence of fish counter-current swimming, the flow field uniformity in the aquaculture tank was significantly reduced,the turbulence intensity increased, the flow velocity at the tank wall increased, and the low-flow velocity area appearedin the center of the tank. The study demonstrated the necessity of considering the impact of fish counter-currentswimming on the flow field within an aquaculture tank. This consideration is crucial when seeking to raise fish welfare,improve production operation management and optimize the structure of the aquaculture tank.

MRF modelFishNumerical simulationFlow field

Xian-Ying Shi、Zheng-Zheng Huang、Meng Li、Yinxin Zhou、Xiao-Zhong Ren、Hang-Fei Liu、Shu-Peng Du

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College of Ocean and Civil Engineering, Dalian Ocean University, Dalian, China||Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University) Ministry of Education, China

Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University) Ministry of Education, China||College of Marine Technology and Environment, Dalian Ocean University, Dalian, China

College of Biosystems Engineering and Food Science, Zhejiang University, Zhejiang, China

2023

10.51400/2709-6998.2716

Journal of Marine Science and Technology

Journal of Marine Science and Technology

ISSN：1023-2796
年,卷(期)：2023.31(4)
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