Volume of fluid-discrete element method based the simulation of floating object motion characteristics in complex terrain

Abstract

To investigate the dynamics of floating objects, such as ships, amidst complex terrain channels, a multi-sphere volume of fluid-discrete element method solver has been developed. This solver combines an open-source computing code (OpenFOAM, LIGGGHTS, and CFDEM) to offer a comprehensive solution. Through rigorous validation against modeling experiments, the solver has demonstrated its accuracy. For instance, during particle drop, the error between the theoretical and experimental traction coefficient and Reynolds number variation curves is only 3.81%. Similarly, for the descent of a multi-sphere cube, the error is a mere 3.64%. Additionally, the solver successfully replicates the uplifting process of a cube in water, with an error of just 2.81%. Another notable advantage of this solver is its ability to perform computational simulations on large-scale complex terrain models. It enables numerical analysis of flotation problems in expansive rivers, providing valuable guidance for engineering design. Consequently, the solver holds significant potential for development in various other engineering applications.