Research on the influence of solid-liquid two-phase flow on the flow field effect and stability of square reefs

IF 4.3 2区农林科学 Q2 AGRICULTURAL ENGINEERING

Aquacultural Engineering Pub Date : 2025-08-15 DOI:10.1016/j.aquaeng.2025.102611

Wenhua Chu , Xinyang Zhang , Minghao Zhai , Liuyang Pan , Zijing Zhao , Qiaoli Zhou

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引用次数: 0

Abstract

In the waters around artificial reefs, due to the driving effect of water flow on sediment, there will be a solid-liquid two-phase flow mixture, which will cause the reef to settle and affect its hydrodynamic performance. In this study, the computational fluid dynamics method was used to establish the numerical calculation model of solid-liquid two-phase flow field and square reef, and the influence of particle concentration factor and reef settlement depth on the flow field effect and stability of reef was analyzed. The settlement and the increase of particle concentration caused by the solid-liquid two-phase flow will lead to the formation of vortexs around the reef and limited effects on the stability. 1)In terms of flow field effect, the particle concentration of the flow field increases from 0.03 kg/m³ to 2 kg/m³, the volume of the upflow decreases by 8.4 %, and the volume of the downflow increases by 24.1 %, indicating that the change of particle concentration in the flow field has limited influence on the flow field effect; 2)In terms of stability, the particle concentration in the flow field increased from 0.03 kg/m³ to 2 kg/m³, and the anti-slip coefficient and anti-overturning coefficient decreased by 8.5 %, indicating that the change of particle concentration in the flow field had limited influence on the stability. When the reef settlement is 67.5 %, the anti-overturning coefficient and anti-slip coefficient increase by 71.9 %, indicating that the settlement can increase the stability. The purpose of this study is to provide a reference for the site selection of square reefs.

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固液两相流对方形礁体流场效应及稳定性的影响研究

在人工鱼礁周围水域，由于水流对泥沙的驱动作用，会形成固液两相流混合物，使鱼礁沉降，影响其水动力性能。本研究采用计算流体力学方法，建立了固液两相流场和方形礁体的数值计算模型，分析了颗粒浓度因子和礁体沉降深度对流场效应和礁体稳定性的影响。固液两相流引起的沉降和颗粒浓度的增加会导致礁体周围形成旋涡，对稳定性影响有限。1)流场效应方面，流场颗粒浓度由0.03 kg/m3增加到2 kg/m3，上流体积减小8.4 %，下流体积增大24.1 %，说明流场颗粒浓度的变化对流场效应的影响有限；2)稳定性方面，流场颗粒浓度从0.03 kg/m3增加到2 kg/m3，抗滑系数和抗倾覆系数下降了8.5 %，说明流场颗粒浓度的变化对稳定性的影响有限。当礁体沉降量为67.5 %时，抗倾覆系数和抗滑系数增加71.9 %，表明沉降可以增加稳定性。本研究旨在为广场礁的选址提供参考。

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来源期刊

Aquacultural Engineering 农林科学-农业工程

CiteScore

8.60

自引率

10.00%

发文量

审稿时长

>24 weeks

期刊介绍： Aquacultural Engineering is concerned with the design and development of effective aquacultural systems for marine and freshwater facilities. The journal aims to apply the knowledge gained from basic research which potentially can be translated into commercial operations. Problems of scale-up and application of research data involve many parameters, both physical and biological, making it difficult to anticipate the interaction between the unit processes and the cultured animals. Aquacultural Engineering aims to develop this bioengineering interface for aquaculture and welcomes contributions in the following areas: – Engineering and design of aquaculture facilities – Engineering-based research studies – Construction experience and techniques – In-service experience, commissioning, operation – Materials selection and their uses – Quantification of biological data and constraints