Numerical modeling of fish movement in a recirculating aquaculture tank： in the case of Schlegel’s black rockfish Sebastes schlegelii
LIU Haibo, REN Xiaozhong, Zhang Qian, BI Chunwei
1.Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University), Ministry of Education, Dalian 116023, China; 2.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
Abstract: In order to explore the influence of flexible fish movement on the characteristics of flow field in an aquaculture tank, the two-dimensional and three-dimensional simulated fish movement models of Schlegel’s black rockfish Sebastesschlegelii were established by Auto CAD and Solidworks, respectively. The fluid-structure coupling numerical model between fish and fluid was established by connecting the model into Fluent module, and the program was written based on UDF macro. The swinging tail wave of fish in 3D space was defined by the moving grid technology based on the swinging tail fin in 2D plane. The results showed that 2d and 3D models established by modeling software were imported into ANSYS through the software interface for simulation calculation. UDF macro based on wave equation of Scad was used to define the movement of bionic fish. Numerical simulation of the bionic modeling showed that the motion of the tail in the fish formed a series of shedding vortex in the end of the tail, and impacted on the flow field around it. The findings showed that the bionic fish movement based on the method to establish model reflected the influence of fish flow field, and that the bionic research method expanded the other fish motion model establishment and applied in research.
刘海波, 任效忠, 张倩, 毕春伟. 循环水养殖池内鱼类运动数值模型的建立——以许氏平鲉为例[J]. 大连海洋大学学报, 2021, 36(6): 995-1002.
LIU Haibo, REN Xiaozhong, Zhang Qian, BI Chunwei. Numerical modeling of fish movement in a recirculating aquaculture tank： in the case of Schlegel’s black rockfish Sebastes schlegelii. Journal of Dalian Ocean University, 2021, 36(6): 995-1002.
2021, Vol. 36 
