压电喷墨液滴撞击光滑壁面铺展行为的数值研究  

Numerical Study of the Spreading Behavior of Piezoelectric Inkjet Droplets Impacting a Smooth Wall

作　　者：武秋敏 马依礼 李飒 朱慧敏 WU Qiumin;MA Yili;LI Sa;ZHU Huimin(Faculty of Printing,Packing and Digital Media Technology,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学印刷包装与数字媒体学院,西安710048

出　　处：《包装工程》2024年第3期186-192,共7页Packaging Engineering

基　　金：陕西省自然科学基础研究计划重点项目(2022JZ-30);陕西省教育厅重点科学研究计划(20JY054);国家自然科学基金(52075435)。

摘　　要：目的 研究典型流体相关无量纲参数对墨滴在光滑承印物表面铺展行为的影响,确定各无量纲参数对铺展直径、铺展因子和稳定铺展时间的影响规律。方法 利用Ansys软件,建立墨滴撞击光滑壁面的数值计算模型,采用VOF模型追踪液滴形状,采用PISO算法计算压力速度耦合。引入韦伯数、雷诺数、奥内佐格数来分析墨滴撞击光滑承印物表面的铺展行为。结果 计算获得不同韦伯数、雷诺数、奥内佐格数下墨滴的最大铺展直径、最终平衡铺展直径、最大铺展因子和最终铺展时间。结论 韦伯数和雷诺数对墨滴最大铺展直径的影响较大,对最终平衡直径的影响较小。韦伯数或雷诺数越小,回缩阶段越短,越快达到平衡。韦伯数、雷诺数与最大铺展因子呈明显正相关。奥内佐格数对墨滴的最大铺展直径、最终平衡直径的影响都较小。奥内佐格数越小,回缩阶段越短,越快达到平衡,奥内佐格数与液滴最大铺展因子呈不明显的正相关性。The work aims to investigate the effect of typical fluid related dimensionless parameters on the spreading behavior of ink droplets on a smooth substrate surface,and determine the effect law of each dimensionless parameter on the spreading diameter,spreading factor,and stable spreading time.Ansys software was used to establish a numerical calculation model for ink droplet impacting a smooth wall.The VOF model was used to track the droplet shape,and the PISO algorithm was used to calculate the pressure velocity coupling.Weber number,Reynolds number and Ohnesorge number were introduced to analyze the spreading behavior of ink droplets impacting the smooth substrate surface.The maximum spreading diameter,final equilibrium spreading diameter,maximum spreading factor and final spreading time of ink droplets under different Weber numbers,Reynolds number points and Ohnesorge numbers were calculated.Weber number and Reynolds number have a greater impact on the maximum spreading diameter of ink droplets,and have a smaller impact on the final equilibrium diameter.The smaller the Weber number or Reynolds number is,the shorter the retraction stage is,and the faster the equilibrium reaches.Weber number and Reynolds number are positively correlated with the maximum spreading factor.Ohnesorge number has little effect on the maximum spreading diameter and final equilibrium diameter of ink droplets.The smaller the Ohnesorge number is,the shorter the retraction stage is,and the faster the equilibrium reaches.There is a slight positive correlation between the Ohnesorge number and the maximum droplet spreading factor.

关 键 词：喷墨印刷 液滴铺展 铺展因子 液滴撞击 

分 类 号：TS853.5[轻工技术与工程]