Volume 18 Issue 4
Aug.  2022
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ZHANG Qian, GUI Jinsong, REN Xiaozhong, XUE Boru, BI Chunwei, LIU Ying. Optimization of flow field in dual-drain square aquaculture tank with relative arc to width ratio[J]. South China Fisheries Science, 2022, 18(4): 119-125. DOI: 10.12131/20210044
Citation: ZHANG Qian, GUI Jinsong, REN Xiaozhong, XUE Boru, BI Chunwei, LIU Ying. Optimization of flow field in dual-drain square aquaculture tank with relative arc to width ratio[J]. South China Fisheries Science, 2022, 18(4): 119-125. DOI: 10.12131/20210044
shu

Optimization of flow field in dual-drain square aquaculture tank with relative arc to width ratio

  • 1.

    Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University), Ministry of Education, Dalian 116023, China

  • 2.

    College of Ocean and Civil Engineering, Dalian Ocean University, Dalian 116023, China

  • 3.

    Dalian University of Technology/State Key Laboratory of Coastal and Offshore Engineering, Dalian 116024, China

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  • Received Date: January 21, 2021
  • Revised Date: November 21, 2021
  • Accepted Date: November 28, 2021
  • Available Online: December 15, 2021
    Graphical Abstract
    • Abstract
  • In order to improve the flow field characteristics in dual-drain square aquaculture tank, we combined arc angle and straight edge to optimize the flow field, so as to provide better aquaculture equipment for the recirculating aquaculture industry. We applied computational fluid dynamics technology to simulate the flow field in dual-drain aquaculture tanks, and evaluated the effect of relative arc to width ratio (R/B, R is the radius of arc angle, B is the side length of tank wall) on the flow field characteristics in the tanks by analyzing corrected velocity v0 and uniformity coefficient UC50. The results show a same rule under different conditions of underflow split ratio (The percentage of outflow from the center outlet at the bottom of the tank in the total outflow). The average velocity in the square arc angle aquaculture tanks with 0.2≤R/B<0.4 was about twice than that in the square aquaculture tanks for the same water exchange rate, but there was no significant difference compared with the circular aquaculture tanks. According to the analysis of flow field uniformity, the square arc angle aquaculture tanks with 0.2≤R/B<0.4 had higher uniformity coefficient, and even higher than that of circular aquaculture tanks. The research indicates that the area of lower velocity caused by the right angle in the square aquaculture tanks reduced effectively by the arc angle in the square arc angle aquaculture tanks, and higher space utilization rate was retained. The advantages of the square aquaculture tank and the circular aquaculture tank are fully combined in the square arc angle aquaculture tank, which solves the problem of poor flow pattern in dual-drain square aquaculture tank, with good industrial popularization and application value.
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    • References (38)
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