Numerical simulation of the drying of inkjet-printed droplets

Siregar, DP Daniel; Kuerten, Johannes G.M.; Geld, van der Cwm Cees

doi:10.1016/j.jcis.2012.09.063

Cited by 42 publications

(38 citation statements)

References 41 publications

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“…This is the reason why numerical simulation of pore ow is a highly relevant and increasingly important approach here. [26][27][28][29] Analysis of drop spreading and penetration for inkjet printing is challenging due to several factors. First, the relevant drop size is in the low picoliter range, with a drop diameter around 24 mm.…”

Section: Introductionmentioning

confidence: 99%

The effect of viscosity and surface tension on inkjet printed picoliter dots

2019

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Section: Introductionmentioning

confidence: 99%

The effect of viscosity and surface tension on inkjet printed picoliter dots

2019

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“…The understanding of sessile drop evaporation is important for many technical applications, including spray cooling [1,2], coating [3], ink-jet printing [4][5][6], DNA stretching and depositing [7,8], and self-assembly and surface patterning [9][10][11]. Analytical expressions for drop evaporation of various complexities have been developed for quasi-steady evaporation when the rate is limited by the rate of vapor diffusion from the drop surface [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Vapor distribution above an evaporating sessile drop

Kelly-Zion

Pursell

Hasbamrer

et al. 2013

International Journal of Heat and Mass Transfer

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An experimental technique was developed that uses infrared tomography to measure the three-dimensional vapor distribution above an evaporating sessile drop. The technique was applied to measure the vapor distributions above evaporating drops of hexane and 3-methylpentane (3MP) at room temperature and pressure. The molecular masses of these two species are heavier than air and the vapor from the evaporating drop forms a flat, disk-shaped cloud. A Fourier transform infrared spectrometer (FTIR) was used to measure the spectral absorbance along a set of paths passing through the vapor cloud. From a set of pathaveraged absorbance measurements, a two-dimensional spatial concentration distribution was determined using a computed tomography routine. A three-dimensional concentration distribution was obtained from multiple two-dimensional distributions obtained at different elevations above the drop.The vapor distributions for both hexane and 3MP differ significantly from the values predicted by the solutions for diffusionlimited evaporation and indicate the effect of buoyancy-induced convection of the vapor. These measurements are the first quantitative measurements of the vapor distribution above a sessile drop and are important for advancing the understanding of the vapor phase transport mechanisms, and thus sessile drop evaporation.

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“…Since interfacial resistance is negligible at the droplet surface, we can assume that the air at the droplet surface is saturated (Popov 2005;Siregar & Kuerten 2013). Therefore, with the ideal gas law, x v,0 can be written in terms of the particle temperature T i and the saturation pressure p v,sat on the droplet surface as…”

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confidence: 99%

Water droplet condensation and evaporation in turbulent channel flow

et al. 2014

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We propose a point-particle model for two-way coupling of water droplets dispersed in the turbulent flow of a carrier gas consisting of air and water vapour. We adopt an Euler-Lagrangian formulation based on conservation laws for the mass, momentum and energy of the continuous phase and on empirical correlations describing momentum, heat and mass transfer between the droplet phase and the carrier gas phase. An incompressible flow formulation is applied for direct numerical simulation of differentially heated turbulent channel flow. The two-way coupling is investigated in terms of its effects on mass and heat transfer characteristics and the resulting droplet size distribution. Compared to simulations without droplets or those with solid particles with the same size and specific heat as the water droplets, a significant increase in Nusselt number is found, arising from the additional phase changes. The Nusselt number increases with increasing ambient temperature and is almost independent of the heat flux applied to the walls of the channel. The time-averaged droplet size distribution displays a characteristic dependence on position expressing the combined effect of turbophoresis and phase changes in turbulent wall-bounded flow. In the statistically steady state that is reached after a long time, the resulting flow exhibits a mean motion of water vapour from the warm wall to the cold wall, where it condenses on average, followed by a net mean mass transfer of droplets from the cold wall to the warm wall.

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Numerical simulation of the drying of inkjet-printed droplets

Cited by 42 publications

References 41 publications

The effect of viscosity and surface tension on inkjet printed picoliter dots

The effect of viscosity and surface tension on inkjet printed picoliter dots

Vapor distribution above an evaporating sessile drop

Water droplet condensation and evaporation in turbulent channel flow

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