Numerical and experimental investigations on pipeline internal solid-liquid mixed fluid for deep ocean mining
Numerical and experimental investigations on pipeline internal solid-liquid mixed fluid for deep ocean mining
复制标题
深海采矿管道内部固液混合流体数值与实验研究
DOI：
10.1016/j.oceaneng.2020.108411
复制
发表时间：
2021-01-12
影响因子：
5
通讯作者：
Li, Xuyang
中科院分区：
文献类型：
--
作者：
Dai, Yu;Zhang, Yanyang;Li, Xuyang
管道内部流动对整个深海采矿的输送过程有着重要的影响。由于内部流动为固液混合流体，因此采用CFD-DEM耦合方法进行数值模拟。通过连接程序Fluent和EDEM对不同流量和颗粒浓度下的管道内部流场进行模拟，计算压力和壁面剪应力的分布。通过建立垂直提升管道实验系统进行室内实验。进一步分析了不同流量和粒径的结核在提升过程中的运动特征和规律。数值模拟与实验结果基本一致，验证了模拟的可靠性。结果表明，内部流速和颗粒浓度影响矿用管道的应力和输送性能。通过研究结果总结了深海采矿管道运输系统稳定性和效率的相关建议。该研究为深海采矿管道系统的优化设计、性能预测和运行控制提供理论和技术参考。
Pipeline internal flow has a significant influence on the transportation process of the entire deep ocean mining. Since the internal flow is a solid-liquid mixed fluid, the CFD-DEM coupling method is adopted for numerical simulation. The pipeline internal flow field at different flow rates and particle concentration is simulated by connecting program Fluent and EDEM, and the distribution of pressure and wall shear stress is calculated. A laboratory experiment is carried out by establishing a vertical lifting pipeline experiment system. The movement characteristics and laws of nodules with different flow rates and particle sizes during the lifting process are further analyzed. The result is basically consistent between numerical simulation and experiment, which verifies the reliability of the simulation. The results show that the internal flow velocity and the particle concentration affect the stress and transportation performance of the mining pipeline. Relevant recommendations for the stability and efficiency of the deep-sea mining pipeline transportation system are summarized through the results. The research provides theoretical and technical references for the optimization design, performance prediction, and operation control of the deep ocean mining pipeline system.