Investigation of dimensional accuracy of metal droplet deposition under repulsion using a lattice Boltzmann approach
Investigation of dimensional accuracy of metal droplet deposition under repulsion using a lattice Boltzmann approach
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使用晶格玻尔兹曼方法研究排斥下金属液滴沉积的尺寸精度
DOI：
10.1108/rpj-10-2020-0236
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发表时间：
2021-06
影响因子：
3.9
通讯作者：
Shanshan Gao
中科院分区：
文献类型：
--
作者：
Yanlin Ren;Zhaomiao Liu;Yan Pang;Xiang Wang;Shanshan Gao
目的：基于三维格子Boltzmann方法（LBM），结合实际工况，研究液滴的浸润和滑动对沉积尺寸的影响，通过控制液滴之间的相互作用，实现均匀沉积。设计/方法/途径。D3 Q19 Shan-Chen LB方法基于金属液滴沉积进行开发和优化。引入Carnahan-Starling状态方程和过渡层以保持较高的稳定性和较低的赝速度。此外，采用附加的碰撞项来实现浸入式移动边界格式，以处理相变前沿的无滑移边界。研究结果：数值计算结果表明，新进入的液滴润湿并从凝固表面滑落以及液滴之间的排斥是导致实际沉积长度偏差的原因。纵截面总长度与沉积距离呈负相关。为了提高尺寸精度，需要保证沉积距离和排斥率。发现最佳沉积距离与润湿性呈负线性相关。独创性/价值。本文开发的数值模型将有助于预测连续金属液滴沉积，并为沉积距离的选择提供指导。
Purpose.This paper aims to investigate the influence of droplet infiltration and sliding on the deposition size and make a uniform deposition by controlling the interaction between droplets, using the three-dimensional lattice Boltzmann method (LBM) based on the actual working condition..Design/methodology/approach.D3Q19 Shan-Chen LB approach is developed and optimized based on the metal droplet deposition. The Carnahan-Starling equation of state and transition layers are introduced to maintain the greater stability and low pseudo velocities. In addition, an additional collision term is adopted to implement immersed moving boundary scheme to deal with no-slip boundaries on the front of the phase change..Findings.The numerical results show that the new¬ incoming droplet wet and slide off the solidified surface and the rejection between droplets are the reasons for the deviation of the actual deposition length. The total length of the longitudinal section negatively correlates with the deposition distance. To improve the dimensional accuracy, the deposition distance and repulsion rate need to be guaranteed. The optimal deposition distance is found to have a negative linear correlation with wettability..Originality/value.The numerical model developed in this paper will help predict the continuous metal droplet deposition and provide guidance for the selection of deposition distance.
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