基于OpenFOAM的悬沙与运动集矿车相互作用数值模拟研究  

Numerical simulation of the interaction between suspended sediment and nodule collector/harvest based on OpenFOAM

作　　者：刘欣 杨博 梁丙臣[1,2] 王振鲁 张嶔[1] 曲孟祥 岳仰昆[1] LIU Xin;YANG Bo;LIANG Bing-chen;WANG Zhen-lu;ZHANG Qin;QU Meng-xiang;YUE Yang-kun(College of Engineering,The Ocean University of China,Qingdao 266100,China;Shandong Provincial Key Laboratory of Ocean Engineering,Qingdao 266100,China)

机构地区：[1]中国海洋大学工程学院,青岛266100 [2]山东省海洋工程重点实验室,青岛266100

出　　处：《水道港口》2023年第1期19-30,共12页Journal of Waterway and Harbor

基　　金：国家自然科学基金项目(51739010);中央高校基本科研业务费专项资助(202013018)。

摘　　要：近年来,深海采矿越来越成为学术研究的前沿热点问题,其中集矿车对海底环境影响问题是重点研究的内容之一。文章基于计算流体力学工具箱OpenFOAM中的两相流混合模块,分别建立我国研制的第二代集矿车[1]的二维和三维简化模型,模拟悬浮沉积物在水中的扩散和沉积过程,植入基于浮力项修正的k-ωSST湍流模型实现湍流闭合,并使用任意耦合滑移网格法(ACMI)实现对集矿车长距离位移的模拟,分析了集矿车与水-沉积物两相流相互作用对周围流场结构的影响,以及三维模拟中壁面效应对模拟结果的影响,探究了沉积物羽流扰动机制,为进一步研究集矿车对海底环境影响提供技术支撑。In recent years,deep-sea mining has increasingly become a hot issue at the forefront of academic research,among which the impact of collection vehicles on the seabed environment is one of the key research elements.In this paper,based on the two-phase mixing model in the computational fluid dynamics toolbox OpenFOAM,a simplified two and three-dimensional model of the second-generation collector vehicle[1]developed in China was established,and the k-ωSST turbulence model based on the correction of the buoyancy term is implanted to achieve turbulence closure,combined with the arbitrary coupled slip mesh method(ACMI)to achieve the simulation of the long-distance displacement of the collector vehicle.The model is used to numerically simulate the interaction between the moving collector and the water-sediment mixture flow.The results show that the generation,development and shedding of the leading edge vortex of the collector in the 2D simulation exerts a periodic force on the collector,while the strength of the trailing edge vortex of the collector in the 3D simulation is mainly influenced by the trailing edge vortex.The results of this paper can provide technical support for the assessment of the impact of the collector on the seabed environment.

关 键 词：深海采矿 计算流体动力学 两相流混合模型 OPENFOAM 动网格 ACMI方法 

分 类 号：U656[交通运输工程—港口、海岸及近海工程] O352[交通运输工程—船舶与海洋工程]