The objectives of this study were to develop the optimal structures of recirculating aquaculture tank for improving the removal efficiency of solid materials and maintaining water quality conditions. Flow analysis was performed using the CFD (computational fluid dynamics) method to understand the hydrodynamic characteristics of the circular tank according to the angle of inclination in the tank bottom (0°, 1.5° and 3°), circulating water inflow method (underwater, horizontal nozzle, vertical nozzle and combination nozzle) and the number of inlets. As the angle in tank bottom increased, the vortex inside the tank decreased, resulting in a constant flow. In the case of the vertical nozzle type, the eddy flow in the tank was greatly improved. The vertical nozzle type showed excellent flow such as constant flow velocity distribution and uniform streamline. The combination nozzle type also showed an internal spiral flow, but the vortex reduction effect was less than the vertical nozzle type. As the number of inlets in the tank increased, problems such as speed reduction were compensated, resulting in uniform fluid flow.

서 론
재료 및 방법
    사육 수조 형상 및 치수
    해석 방법
결과 및 고찰
    사육 수조 내부의 유동 특성
    바닥 경사도에 따른 사육 수조의 유동 특성
    순환수 유입 방식에 따른 사육 수조의 유동 특성
    순환수 유입구 수에 따른 사육 수조의 유동 특성
결 론
References

• 권인영(전남대학교 스마트수산양식연구센터) | Inyeong KWON (Smart Aquaculture Research Center, Chonnam National University)
• 김태호(전남대학교 해양생산관리학과) | Taeho KIM (Department of Marine Production Management, Chonnam National University) Corresponding Author