Numerical Simulation of Sphere Water Entry Problem Based on VOF and Dynamic Mesh Methods

摘要

This paper presents a numerical experiment of single low-densityrnsphere falling into the water from the air. A sphere with initial speed inrnthe air was released above the water surface, splashes and waves willrnbe generated when it touched the water; after that, it jumped abovernwater because of buoyancy. The procedure is simulated by the Openrnsource Field Operation and Manipulation (OpenFOAM) based on VOFrnmethod and dynamic mesh method. The result of time history ofrnhydrodynamic forces and sphere's motion is given. Validations of gridrnand time convergence are performed in order to prove the correctnessrnof this method. Results of the velocity field and the pressurerndistribution around the sphere are discussed.