Numerical simulation of the hydrodynamics within octagonal tanks in recirculating aquaculture systems

Yao Liu; Baoliang Liu; Jilin Lei; Changtao Guan; Bin Huang

doi:10.1007/s00343-017-6051-3

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Numerical simulation of the hydrodynamics within octagonal tanks in recirculating aquaculture systems

OriginalPaper | Updated：2023-05-16

- Numerical simulation of the hydrodynamics within octagonal tanks in recirculating aquaculture systems
- Numerical simulation of the hydrodynamics within octagonal tanks in recirculating aquaculture systems
- 海洋湖沼学报（英文） 2017年35卷第4期页码：912-920
- Affiliations：
  
  1. Key Laboratory for Sustainable Development of Marine Fisheries Ministry of Agriculture Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences
  2. Marine College Shandong Univercity Weihai
- Author bio：
- Funds：
  
  Supported by the Application Research Project of Post-Doctoral Researchers in Qingdao (No. ZQ51201415037), the Modern Agriculture Industry System Construction of Special Funds (No. CARS-50-G10), the Special Project about Independent Innovation and Achievement Transformation of Shandong Province (No. 2014ZZCX07102), and the Key R&D Program of Jiangsu Province (No. BE2015328)
- DOI：10.1007/s00343-017-6051-3
  中图分类号：
- 网络首发：2016-07-28，
  
  纸质出版：2017
- Accepted：
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Numerical simulation of the hydrodynamics within octagonal tanks in recirculating aquaculture systems[J]. 海洋湖沼学报（英文）, 2017,35(4):912-920.

Liu, Y., Liu, B., Lei, J. et al. Numerical simulation of the hydrodynamics within octagonal tanks in recirculating aquaculture systems., Chin. J. Ocean. Limnol. 35, 912–920 (2017). https://doi.org/10.1007/s00343-017-6051-3
Numerical simulation of the hydrodynamics within octagonal tanks in recirculating aquaculture systems[J]. 海洋湖沼学报（英文）, 2017,35(4):912-920. DOI： 10.1007/s00343-017-6051-3.

Liu, Y., Liu, B., Lei, J. et al. Numerical simulation of the hydrodynamics within octagonal tanks in recirculating aquaculture systems., Chin. J. Ocean. Limnol. 35, 912–920 (2017). https://doi.org/10.1007/s00343-017-6051-3 DOI：

摘要

Abstract

A three-dimensional numerical model was established to simulate the hydrodynamics within an octagonal tank of a recirculating aquaculture system. The realizable k-ε turbulence model was applied to describe the flow

the discrete phase model (DPM) was applied to generate particle trajectories

and the governing equations are solved using the finite volume method. To validate this model

the numerical results were compared with data obtained from a full-scale physical model. The results show that: (1) the realizable k-ε model applied for turbulence modeling describes well the flow pattern in octagonal tanks

giving an average relative error of velocities between simulated and measured values of 18% from contour maps of velocity magnitudes; (2) the DPM was applied to obtain particle trajectories and to simulate the rate of particle removal from the tank. The average relative error of the removal rates between simulated and measured values was 11%. The DPM can be used to assess the self-cleaning capability of an octagonal tank; (3) a comprehensive account of the hydrodynamics within an octagonal tank can be assessed from simulations. The velocity distribution was uniform with an average velocity of 15 cm/s; the velocity reached 0.8 m/s near the inlet pipe

which can result in energy losses and cause wall abrasion; the velocity in tank corners was more than 15 cm/s

which suggests good water mixing

and there was no particle sedimentation. The percentage of particle removal for octagonal tanks was 90% with the exception of a little accumulation of ≤ 5 mm particle in the area between the inlet pipe and the wall. This study demonstrated a consistent numerical model of the hydrodynamics within octagonal tanks that can be further used in their design and optimization as well as promote the wide use of computational fluid dynamics in aquaculture engineering.

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references

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