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

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Publicado no:Micromachines vol. 16, no. 6 (2025), p. 621-635
Autor principal: Song, Hailong
Outros Autores: Yan, Ran, Xia Lei, Zhao, Qing, Qiu Qing
Publicado em:
MDPI AG
Assuntos:
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
Acesso em linha:Citation/Abstract
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Resumo: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
Fonte:Engineering Database