A systematic study on numerical simulation of electrified jet printing

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Rahmat, Amin and Koç, Bahattin and Yıldız, Mehmet (2017) A systematic study on numerical simulation of electrified jet printing. Additive Manufacturing . ISSN 2214-7810 (Print) 2214-8604 (Online) Published Online First http://dx.doi.org/10.1016/j.addma.2017.08.004

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Official URL: http://dx.doi.org/10.1016/j.addma.2017.08.004


In this paper, a systematic study on the numerical modeling for electrified jet printing is presented. The numerical tool is the Volume of Fluid (VOF) method which suits for modeling multiphase flows with a continuous interface. The surface tension force is calculated with the Continuum Surface Force (CSF) method and the electric forces are added to the momentum equation by taking the divergence of the Maxwell stress tensor. A systematic study is carried out by introducing three dimensionless numbers, Reynolds, Electro-Weber and Weber numbers. Employing these dimensionless numbers, the number of effective parameters is reduced, and a relative comparison on the importance of competing forces on the process becomes possible. It is observed that the electric forces contribute to the formation of the jet by acting on its tip, and by pulling the jet towards the deposition surface. The results show that increments of Reynolds and Electro-Weber numbers both lead to form a thinner jet. It is also seen that in larger Electro-Weber and Reynolds numbers, an unstable jet is obtained.

Item Type:Article
Uncontrolled Keywords:Numerical simulation; Multiphase flows; Jet printing; VOF model; Electrohydrodynamics (EHD)
Subjects:T Technology > TJ Mechanical engineering and machinery > TJ170-179 Mechanics applied to machinery. Dynamics
ID Code:33988
Deposited By:Bahattin Koç
Deposited On:18 Sep 2017 11:35
Last Modified:10 Mar 2020 15:20

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