Simulation Study of Ink Droplet Spraying Based on Sand 3D Printing

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Dades bibliogràfiques
Publicat a:	Micromachines vol. 16, no. 6 (2025), p. 621-635
Autor principal:	Song, Hailong
Altres autors:	Yan, Ran, Xia Lei, Zhao, Qing, Qiu Qing
Publicat:	MDPI AG
Matèries:	Finite volume method Simulation Velocity Energy conservation Ejection Printers (data processing) Viscosity Piezoelectricity Nozzle geometry 3-D printers Surface tension Mathematical models Heat Fluids Spraying Printing Computational fluid dynamics Three dimensional printing Contact angle Sand molds Inkjet printing Droplets Driving conditions Efficiency Interfaces
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Descripció
Resum:	To address the challenge of imprecise micro-droplet formation control in piezoelectric jetting devices used in sand mold 3D printing and apply on-demand inkjet printing technology to sand mold manufacturing, this study first explains the working principle of a piezoelectric shear-mode printhead. A mathematical model of the droplet ejection process is then established based on Computational Fluid Dynamics (CFD). Building upon this model, numerical simulations of droplet generation, breakup, and flight are conducted by using the Volume of Fluid (VOF) model within the Fluent module of the Workbench 2020 R2 platform. Finally, under consistent driving conditions, the effects of key parameters—viscosity, surface tension, and inlet velocity—on the ejection process are investigated through simulation. Based on the results, appropriate ranges and recommended values for ink properties are determined. This study provides significant engineering value for improving the stability and precision of droplet formation in industrial sand mold 3D printing.
ISSN:	2072-666X
DOI:	10.3390/mi16060621
Font:	Engineering Database