Time evolution of liquid drop impact onto solid, dry surfaces

Rioboo, Romain; Marengo, Marco; Tropea, Cameron

doi:10.1007/s00348-002-0431-x

Cited by 781 publications

(530 citation statements)

References 22 publications

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“…Numerous studies of droplet spreading after droplet impact have been conducted by observing the millimeter or micrometer droplet impact, [1][2][3][4] to share fruitful knowledge with us. At the early stage of droplet impact, the spreading radius R was found to be given by…”

Section: Introductionmentioning

confidence: 99%

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Early stage of nanodroplet impact on solid wall

et al. 2016

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In this study, we investigated nanodroplet spreading at the early stage after the impact using molecular dynamics simulations by changing the magnitude of the intermolecular force between the liquid and wall molecules. We showed that the droplet deformation after the impact greatly depends on the intermolecular force. The temporal evolution of the spreading diameters was measured by the cylindrical control volume for several molecular layers in the vicinity of the wall. At the early stage of the nanodroplet impact, the normalized spreading radius of the droplet is proportional to the square root of the normalized time,t. This result is understood by the geometrical consideration presented by Rioboo et al.["Time evolution of liquid drop impact onto solid, dry surfaces," Exp. Fluids 33, 112-124 (2002)]. In addition, we found that as the intermolecular force between the liquid and wall becomes stronger, the normalized spreading diameter of the first molecular layer on the wall remains less dependent on the impact velocity. Furthermore, the time evolution of the droplet spreading changes from √t to logt with time. C 2016 AIP Publishing LLC.

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Section: Introductionmentioning

confidence: 99%

“…Rioboo et al 2 experimentally showed that Eq. (1) arises from the geometric considerations of droplet spreading at the early stage (fort ≤ 0.1), which they called as the kinematic phase.…”

Section: Introductionmentioning

confidence: 99%

Early stage of nanodroplet impact on solid wall

et al. 2016

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“…Computational modeling of water droplet deformation was performed by Songoro, Gjonaj, and Weiland (2012), while Hatta, Fujimoto, and Takuda (1995) performed an experimental and computational study of deformation of water and n-heptane droplets, concluding that a zero surface tension model was in accordance with the experimental results reported in Chandra and Avedisian (1991). Rioboo, Marengo, and Tropea (2002) experimentally investigated the time evolution of droplet deformation due to its impact on a dry surface. They investigated different Reynolds numbers (Re = ρ * u * L R /μ * ) and Weber numbers (We = ρ * u * 2 L R /σ * ) for glycerin, silicone oil and water, performing experiments on different solid surfaces of glass, coated glass, and polymer.…”

Section: Introductionmentioning

confidence: 87%

“…And thus, the initiation and the intensity of curing depend on the small window of time, which is this initial period. In this present work, the droplet deformation has been numerically investigated up to the spreading stage (Rioboo et al, 2002) for different governing parameters, and results have been presented, as mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of post-impact droplet deformation for direct-print

Hasan

Chandy

Choi

2015

Engineering Applications of Computational Fluid Mechanics

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Two-dimensional (2D) numerical investigations of droplet impacts on a solid surface and the consequent deformation have been performed. The application lies in the direct-print technology where droplets are used to create lines and instantly cured to maintain line dimension. The investigation focuses on the evolution of droplet shape at the initial stage after the impact for Newtonian fluids. More specifically, the investigation emphasized the time for an impacted droplet to start increasing its diameter after the initial compression due to impact. A computational model has been developed by utilizing an adaptive quadtree spatial discretization with piecewise-linear geometrical volume-of-fluid (VOF) for this multiphase problem. The continuum-surface-force method and the height-function (HF) were employed for estimating the surface tension and the interface curvature, respectively. The Gerris Flow Solver, an open-source finite-volume package, was used for developing the computational model. The investigation was performed for the governing parameters of the Froude number (Fr), Reynolds number (Re), and Weber number (We). The results are presented as the interface contour, spreading factor (ξ ), and deformation ratio (R δ ). The investigation shows that the results from the developed model have excellent agreement with the experimental results.

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“…These control parameters include wettability of the surface, surface tension, impact velocity of the droplet, liquid density, liquid viscosity, and surface roughness. [1][2][3][4][5][6][7][8][9][10] Understanding the behaviors of droplets impacting a nanostructured solid surface plays an important role in industrial and environmental processes, such as spray cooling, ink-jet printing, and deposition of rain on solid surfaces. 11 Droplets that impact a textured solid surface immediately spread at the moment of impact.…”

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confidence: 99%

A study on the dynamic behaviors of water droplets impacting nanostructured surfaces

et al. 2011

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We have investigated the influence of impact velocity and intrinsic surface wettability of nanostructures on the impact dynamic behaviors of water droplets on nanostructure surfaces. Nanowires array surfaces with tunable wettabilities ranging from superhydrophilic to superhydrophobic were fabricated by the deposition of surface modifiers differing in alkyl chain length. The transition criteria of rebound/wetting state and rebound/splashing state based on the relationship between the Webber (We) number and the surface free energy were determined. We have confirmed that the critical We number that determines the transition of the rebound/wetting increased as surface energy decreased. Additionally, the We number at which fragmentation occurred on our superhydrophobic surface was relatively low compared to previously reported values

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Time evolution of liquid drop impact onto solid, dry surfaces

Cited by 781 publications

References 22 publications

Early stage of nanodroplet impact on solid wall

Early stage of nanodroplet impact on solid wall

Numerical analysis of post-impact droplet deformation for direct-print

A study on the dynamic behaviors of water droplets impacting nanostructured surfaces

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