3DP工艺中双液滴渗透数值模拟与仿真研究  

Study on Numerical Simulation of Double Droplets Infiltration in 3DP Technology

作　　者：王媛媛[1] 杨伟东[1] 贾鹏飞[1] 牛子佳 张思祥[1] Wang Yuanyuan;Yang Weidong;Jia Pengfei;Niu Zijia;Zhang Sixiang(School of Mechanical Engineering,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学机械工程学院,天津300130

出　　处：《机械科学与技术》2019年第3期409-414,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：河北省自然科学基金项目(E2016202297)资助

摘　　要：为了提高3DP工艺的精度,需预测粘结剂与颗粒材料粘结的形态,而通过实验很难观测到液滴在粉床中的渗透过程。本文通过应用水平集方法建立了双液滴渗透过程的数学模型,运用多物理场仿真软件COMSOL对其进行了数值模拟,分析了主要工艺参数—液滴水平间距和滴落高度对液滴渗透的形态的影响。同时为验证数学模型和仿真结果的一致性,搭建了实验平台,采用高速摄影对液滴的滴落渗透过程进行图像采集,并通过电子显微镜观测最终的凝聚形态。将实验结果与仿真结果进行了对比,验证了数值模拟的准确性,为进一步的实验研究提供了理论依据。It is difficult to observe the infiltration process of droplets in the powder bed through experiments,therefore a mathematical model is established with the horizontal set method,in order to improve the accuracy of three-dimension printing(3DP)process and to predict the bonding of binder and granular material.The numerical simulation of droplets infiltration process is carried out via COMSOL software.The forms of droplets infiltration are influenced mainly by the droplets horizontal spacing and drop height.The experiment platform is set up to verify the consistency of the mathematical model and simulation results.The high-speed camera is utilized to capture the images of droplets infiltration process and the electron microscopy is utilized to observe the final condensed forms.The experimental results are compared with the simulated,in which the accuracy is verified,and which provides a basis for further research.

关 键 词：3DP工艺 数值模拟 COMSOL 液滴渗透 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]