Numerical simulation of aerosol dynamics in an impinging jet with microdroplet coalescence

Wu, Jiandong; Xu, Jinliang; Wang, Hao

doi:10.1080/02786826.2020.1740162

Cited by 4 publications

(3 citation statements)

References 63 publications

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“…The mass density and dynamic viscosity of nitrogen were calculated using the ideal gas state equation and the Sutherland formula, respectively. The Sutherland formula, which describes the shear viscosity of a gas, is shown as follows [24]:…”

Section: Experimental Methodsmentioning

confidence: 99%

Experimental and Numerical Investigation on the Aerosol Micro-Jet 3D Printing of Flexible Electronic Devices

Zhang,

Zhu,

Jiao

et al. 2023

Materials

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In this study, the optimal forming parameters for printing flexible circuits using aerosol jet printing technology are explored through numerical simulation and experiments. The printhead during the deposition process is numerically simulated. By employing the controlled variable method, the process parameters such as gas flow rate, working distance, nozzle diameter, and printing speed are selected to investigate their effects on the morphology of the printed lines. Accordingly, single-factor experiments are designed to validate the printing of flexible circuits on both planar and curved substrates. Laser micro-sintering is utilized to improve the conductivity of the printed lines and ultimately fabricate flexible strain sensors. Under the sheath gas flow rate of 400 sccm, carrier gas flow rate of 100 sccm, working distance of 3 mm, nozzle diameter of 500 μm, and printing speed of 10 mm/s, the optimal morphology of the printed lines is achieved with low linewidth characteristics. The variations in the focal ratio, working distance, nozzle diameter, and printing speed significantly affect the minimum feature line width and morphology of the printed lines.

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Section: Experimental Methodsmentioning

confidence: 99%

Experimental and Numerical Investigation on the Aerosol Micro-Jet 3D Printing of Flexible Electronic Devices

Zhang,

Zhu,

Jiao

et al. 2023

Materials

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“…This is phenomenon is more obvious for aerosol jet printing where the interaction between the strong impinging flow and the solvent‐rich ink could disrupt the homogeneity of the uncured dried film (Figure 6c). [ 135–137 ] This can be easily overcome by integrating a sintering or curing system into the printer to allow in‐situ treatment of the dried film before printing the next layer. Lastly, the sintering and curing method for treating the thick dried film has to be carefully selected.…”

Section: Design and Fabrication Considerations Approaches And Strategies For 3d Printed Mlmm Electronicsmentioning

confidence: 99%

3D Printing of Multilayered and Multimaterial Electronics: A Review

Goh

Zhang

Chong

et al. 2021

Adv Elect Materials

153

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3D printing, also known as additive manufacturing, is a manufacturing process in which the materials are deposited layer by layer in an additive manner. With the advancement in materials and manufacturing technology, 3D printing has found its applications in the field of electronics manufacturing. Initially, 3D printing is used for the fabrication of electronic components with single material designs such as resistors, inductors, circuits, antennas, strain gauges, etc. Recently, there are many works involving the use of 3D printing fabrication techniques for advanced electronic components and devices such as parallel plate capacitors, inductors, organic light‐emitting diodes, photovoltaics, transistors, displays, etc. which involve multilayer multimaterial printing. Despite these many works, there has been no review on the design and fabrication consideration for the 3D printing of multilayered and multimaterial (MLMM) electronics. As such, this review aims to summarize the current landscape of 3D printing of MLMM electronics and provide some insights on the design consideration, fabrication strategies, and challenges of 3D printing of MLMM electronics. In particular, the focus will be placed on discussing the interface conditions between different materials such as surface wettability, surface roughness, material compatibility, and the considerations for postprocessing treatments.

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“…In order to simplify the problem and reduce calculation costs, the complex particle–particle and particle–fluid interactions have been ignored in previous studies. However, Wu et al [ 13 ] noted the particle collision is obvious when the discrete phase volume fraction is larger than 0.008% in an impinging jet. Trofa et al [ 14 ] observed that 5 µm particles will modify the surrounding flow, affecting particle movement when particle volume fraction is about 0.05–0.1%.…”

Section: Introductionmentioning

confidence: 99%

CFD-DEM Coupling Model for Deposition Process Analysis of Ultrafine Particles in a Micro Impinging Flow Field

et al. 2022

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Gas with ultrafine particle impaction on a solid surface is a unique case of curvilinear motion that can be widely used for the devices of surface coatings or instruments for particle size measurement. In this work, the Eulerian–Lagrangian method was applied to calculate the motion of microparticles in a micro impinging flow field with consideration of the interactions between particle to particle, particle to wall, and particle to fluid. The coupling computational fluid dynamics (CFD) with the discrete element method (DEM) was employed to investigate the different deposition patterns of microparticles. The vortex structure and two types of particle deposits (“halo” and “ring”) have been discussed. The particle deposition characteristics are affected both by the flow Reynolds number (Re) and Stokes number (stk). Moreover, two particle deposition patterns have been categorized in terms of Re and stk. Finally, the characteristics and mechanism of particle deposits have been analyzed using the particle inertia, the process of impinging (particle rebound or no rebound), vortical structures, and the kinetic energy conversion in two-phase flow, etc.

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Numerical simulation of aerosol dynamics in an impinging jet with microdroplet coalescence

Cited by 4 publications

References 63 publications

Experimental and Numerical Investigation on the Aerosol Micro-Jet 3D Printing of Flexible Electronic Devices

Experimental and Numerical Investigation on the Aerosol Micro-Jet 3D Printing of Flexible Electronic Devices

3D Printing of Multilayered and Multimaterial Electronics: A Review

CFD-DEM Coupling Model for Deposition Process Analysis of Ultrafine Particles in a Micro Impinging Flow Field

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