机械科学与技术2017，Vol.36Issue(6)：965-970,6.DOI:10.13433/j.cnki.1003-8728.2017.0624
单液滴冲击多孔介质过程的数值模拟与试验
Process Simulation and Experiments of Single Droplet Impactingon Porous Materials
摘要
Abstract
In three-dimensional printing process,the behavior and the properties of the droplet has an great impact on the quality of the printed parts when the binder penetrate into the materials.This paper established a numerical model to study the impact process of a single droplet on the porous media,including the expansion,penetration.In order to accurately describe the dynamic effect of the droplet flow,VOF (Volume of fluid) model is used to track the droplet shape.The PISO (Pressure implicit split operator) algorithm is selected to solve the pressure-velocity combinations.the effect of the droplet characteristics,the impact velocity of the droplet and porosity of the porous media on droplet expansion characteristics was focused.The results showed that the droplet extension radius increases with the increasing of initial droplet velocity and decrease with the increasing of viscosity;the smaller the porosity of the porous media is and the bigger the expansion radius of the droplet,the smaller the penetration thickness.关键词
液滴/多孔介质/冲击速度/孔隙率Key words
droplet/porous media/impact velocity/porosity分类
机械制造引用本文复制引用
周攀,李淑娟,杨磊鹏..单液滴冲击多孔介质过程的数值模拟与试验[J].机械科学与技术,2017,36(6):965-970,6.基金项目
国家重点基础研究发展规划项目(2009CB724406)与陕西省重点实验室项目(13JS071)资助 （2009CB724406）
