Three-dimensional Numerical Simulation of Free-fall Drop Impact onto the surface of a Liquid Pool

• 1、School of Hydraulic Engineering , Changsha University of Science & Technology, ChangSha 410004
• 2、School of Hydraulic Engineering , Changsha University of Science & Technology, Changsha 410004

Abstract：Free-fall drop impact onto the surface of a liquid pool is a good example for interface modeling methods since it involves complicated flow deformations such as splashing, coalescence and bouncing. Besed on three-dimensional unsteady Navier-Stokes equations,The finite volume method was used to discretize the governing equations. A numerical model with free-surface flow of high precision was established by using a High-resolution scheme of VOF method (STACS) and Continuum Surface Force(CSF) model. The validity of the simulation following this model was examined through shearing flow phenomena. It was used to detailedly simulate the whole process of the droplet free falling and its impact onto the surface of a liquid pool then. The simulated results show that this model can predict the hydrodynamics and interaction characteristics of 3D drop impacting, deformation, bouncing and so on. The current method gives remarkably fine features of the interface, and it can be applied to investigate the three-dimension gas-liquid two-phase flow problems with complicated free-surface flow.

Keywords： Drop Two-pahse Flow VOF method High-resolution