Influence of inlet placement on the hydrodynamics of the dual-drain arc angle tank for fish growth

The aquaculture tank is an infrastructure for aquaculture, and the choice of its geometry, structural design of the inlet and outlet pipes and the placement position and other parameters are crucial to the influence of the hydrodynamic performance of the tank. In this paper, a numerical computational model of the hydrodynamics of a dual-channel rectangular circular-angle culture tank is established using the RNG k-ε turbulence model based on the Reynolds-averaged N-S equation (RANS) averaged over time. The three-dimensional simulation of the internal flow field of the breeding tank under the hydraulic drive mode of the dual inlet pipe structure was verified by comparing with the experimental results of the physical model, and the accuracy of the numerical model in simulating the flow characteristics in the rectangular circular-angle breeding tank was demonstrated. The model was further applied to study the effect of the relative inflow distance on the hydrodynamic characteristics inside the culture tank, and the energy effective utilization coefficient was proposed to measure the effective utilization of energy inside the culture tank system.The present study has shown that the relative inflow distance was an important parameter in the construction of the system flow field, the average velocity of aquaculture system (a = 0.05, P