CFD-DEM coupling with multi-sphere particles and application in predicting dynamic behaviors of drifting boats. (1st March 2022)

• Record Type: Journal Article
• Authors: Nan, Xuan; Hou, Jingming; Shen, Zhihao; Tong, Yu; Li, Guodong; Wang, Xuedong; Kang, Yongde
• Is Part Of: Ocean engineering. Volume 247(2022)
• Publication Date: 2022-03-01
• Subjects: Multi-sphere particles -- CFD-DEM -- Force level -- Boat motion stability; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2021.110368
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: To simply predict the motion characteristics of a floating ship on the river and assess the safety in floating, this work developed a multiphase fluid-solid coupling solver based on the Volume of Fluid (VoF) model in open-source code OpenFOAM and multi-sphere DEM model in LIGGGHTS. Benchmarks of non-spherical particles settling in the single-phase and two-phase fluids at different Reynolds numbers were studied. The results show that the solver is relatively accurate and can approximately capture the settlement trajectory of particles under different Reynolds numbers. In application, the drift behaviors of a floating ship with different densities were studied. We introduced the hydrodynamic parameters to characterize the mechanical states and evaluate the stability of the drifting boat. We found that the hull weight has a significant influence on the ship drifting motion. Therefore, ship designers can design the ship according to the proposed model to ensure the safety of drifters. Highlights: On the basis of the VOF-DEM coupling realized by embedding VOF model, the algorithm of multi-spherical particles was added. The unresolved CFD-DEM algorithm can quickly calculate the motion of a simple model on the free surface. The hydrodynamic parameters are introduced to unify the local and global force analysis of the model.