Numerical simulation of inlet placement on sewage characteristics in the rounded square aquaculture tank with single inlet  

作　　者：Xiaozhong REN Yixuan HU Yinxin ZHOU Shupeng DU Wei SUN Hangfei LIU Chenxu ZHAO Ying LIU 

机构地区：[1]Key Laboratory of Environment Controlled Aquaculture(Dalian Ocean University)Ministry of Education,Dalian 116023,China [2]College of Marine Science and Environment,Dalian Ocean University,Dalian 116023,China [3]College of Ocean and Civil Engineering,Dalian Ocean University,Dalian 116023,China [4]Zhejiang University,Hangzhou 310058,China

出　　处：《Journal of Oceanology and Limnology》2024年第4期1359-1382,共24页海洋湖沼学报（英文）

基　　金：Supported by the 2023 Central Government Finance Subsidy Project for Liaoning Fisheries,the Key Research Project of Liaoning Provincial Department of Education in 2022(No.LJKZZ20220091);the National Natural Science Foundation of China(No.31872609);the Innovation Support Program for High-level Talents of Dalian City(No.2019RD12);the earmarked fund for CARS-49。

摘　　要：To improve the self-cleaning ability of aquaculture tank and the efficiency of circulating water,physical and numerical experiments were conducted on the influence of inlet structure on sewage discharge in a rounded square aquaculture tank with a single inlet.Based on the physical model of the tank,analysis of how inlet structure adjustment affects sewage discharge efficiency and flow field characteristics was conducted to provide suitable flow field conditions for sinkable solid particle discharge.In addition,an internal flow field simulation was conducted using the RNG k-εturbulence model in hydraulic drive mode.Then a solid-fluid multiphase model was created to investigate how the inlet structure affects sewage collection in the rounded square aquaculture tank with single inlet and outlet.The finding revealed that the impact of inlet structure is considerably affecting sewage collection.The conditions of C/B=0.07-0.11(the ratio of horizontal distance between the center of the inlet pipe and the tank wall(C)to length of the tank(B))andα=25°(αis the angle between the direction of the jet and the tangential direction of the arc angle)resulted in optimal sewage collection,which is similar to the flow field experiment in the rounded square aquaculture tank with single inlet and outlet.An excellent correlation was revealed between sewage collection and fluid circulation stability in the aquaculture tank.The present study provided a reference for design and optimization of circulating aquaculture tanks in aquaculture industry.

关 键 词：rounded square aquaculture tank sewage collection characteristic inlet structure computational fluid dynamic 

分 类 号：X714[环境科学与工程—环境工程]