The FEM based liquid transfer model in gravure offset printing using phase field method

Park, Sang‐Shin; Jeon, Youngwon; Cho, Migyung; Bai, Cheolho; Lee, Dong-yeon; Shim, Jaesool

doi:10.1007/s00542-012-1652-4

Cited by 9 publications

(8 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…27) Recently, Park et al have reported a new simulation model by using a finite element method (FEM) and showed the relation between velocity and liquid transfer. 28) Although the liquid transfer ratio in their numerical simulation shows a slow decrease as the process speed becomes low, this is very different from the experimental results. The experimental results from Sankaran and Rothstein show dramatic decreases in the low speed ranges.…”

Section: Introductionmentioning

confidence: 82%

“…The fluid-air interface was simulated by the phase field method in the numerical modeling. 28) For the two phases, density and viscosity are defined with respect to the shape of the interface,…”

Section: Numerical Analysismentioning

confidence: 99%

“…23) The transfer property was also investigated from numerical analysis. [24][25][26][27][28] Powell et al developed a Lagrangian finite element algorithm for fluid flow related to substantial free surface deformation. 24) Huang et al carried out a computer simulation on liquid transfer between two parallel plates using the volume of fluid (VOF) method.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic effect of surface contact angle on liquid transfer in a low speed printing process

Bai

Shim

Lee

et al. 2014

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

In this study, experiments on liquid transfer were performed to observe the change of the surface contact angle with respect to the process speed. The liquid transfer ratio from the experiments was compared with that from numerical simulation for low speed ranges. While the surface contact angle on the lower plate was almost constant in the experiment regardless of operating speed, the surface contact angle on the upper plate was found to be significantly changed during the process at the low speed ranges. This resulted in a reduction of the transfer ratio. By applying the time-dependent values of contact angle to the numerical simulation model, the transfer ratio showed better agreement with the experimental results. The dynamic effect of surface contact angle should be considered as an additional variable, especially for the analysis of liquid transfer in a low speed printing process.

show abstract

Section: Introductionmentioning

confidence: 82%

Section: Numerical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic effect of surface contact angle on liquid transfer in a low speed printing process

Bai

Shim

Lee

et al. 2014

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Eulerian approaches for handling the mobbing boundaries have been reported for interface tracking by a fixed Eulerian grid using a scalar indicator function 22 , 23 , which are classified as the volume-of-fluid (VOF) method, the level set method, and the phase field method. The phase field method is one of the most attractive tools that can deal with interfacial problems, formulate the true-to-motion behavior of complex interfaces, and treat the topological changes of the interface between two fluids 24 .…”

Section: Numerical Modelmentioning

confidence: 99%

Energy harvesting performance of an EDLC power generator based on pure water and glycerol mixture: analytical modeling and experimental validation

Kim

Shim

Kim

2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

A liquid droplet oscillating between two plane electrodes was visualized, and the electrical power generation based on the reverse-electrowetting-on-dielectric (REWOD) phenomenon was measured. For the upper plate, a hydrophobic surface treated by PTFE was used, and the lower plate was tested using the hydrophilic surface properties of ITO glass. To analyze the dynamic behavior of an oscillating liquid bridge, a modeling study was carried out using the phase field method based on the finite element method. The dynamic contact angle of the oscillating liquid bridge was modeled based on advancing and receding contact angles. The variable interfacial areas between the liquid and solid surfaces were calculated and agreed well with the experimental results within a 10% error band. Furthermore, experimental and analytical studies were carried out to examine the REWOD energy harvesting characteristics of the glycerol-water mixtures in various concentrations. As a result, the peak voltage output was obtained at a specific concentration of the glycerol mixture, and the power density of the oscillating liquid bridge at this point was up to 2.23 times higher than that of pure water.

show abstract

“…It was shown that when Re > 1 the formation of satellite drops upon bridge breakage could be observed, and the transfer ratio was found to increase from 0.08 to approximately 0.5 when Re increased from 0.1 to 100. In Park et al, 22 water transfer from a donor surface with an SCA of 60°to an acceptor surface with an SCA of 70°at different U values (10 to 250 mm/s) was simulated with the VOF method. Their results showed that the transfer ratio increased from 0.07 to 0.36 with the increase in U from 10 to 200 mm/s.…”

Section: Introductionmentioning

confidence: 99%

Fast Liquid Transfer between Surfaces: Breakup of Stretched Liquid Bridges

2015

View full text Add to dashboard Cite

In this work, a systematic experimental study was performed to understand the fast liquid transfer process between two surfaces. According to the value of the Reynolds number (Re), the fast transfer is divided into two different scenarios, one with negligible inertia effects (Re ≪ 1) and the other with significant inertia effects (Re > 1). For Re ≪ 1, the influences of the capillary number (Ca) and the dimensionless minimum separation (H(min)* = H(min)/V(1/3), where H(min) is the minimum separation between two surfaces and V is the volume of liquid) on the transfer ratio (α, the volume of liquid transferred to the acceptor surface over the total liquid volume) are discussed. On the basis of the roles of each physical parameter, an empirical equation is presented to predict the transfer ratio, α = f(Ca). This equation involves two coefficients which are affected only by the surface contact angles and H(min)* but not by the liquid viscosity or surface tension. When Re > 1, it is shown for the first time that the transfer ratio does not converge to 0.5 with the increase in the stretching speed.

show abstract

The FEM based liquid transfer model in gravure offset printing using phase field method

Cited by 9 publications

References 18 publications

Dynamic effect of surface contact angle on liquid transfer in a low speed printing process

Dynamic effect of surface contact angle on liquid transfer in a low speed printing process

Energy harvesting performance of an EDLC power generator based on pure water and glycerol mixture: analytical modeling and experimental validation

Fast Liquid Transfer between Surfaces: Breakup of Stretched Liquid Bridges

Contact Info

Product

Resources

About