Liquid volume measurements in the cavity formed by single droplet impacts into a thin, static liquid film

Kuhlman, John M.; Hillen, Nicholas L.; Dinc, Murat; Gray, Donald D.

doi:10.1016/j.expthermflusci.2013.12.007

Cited by 14 publications

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Theoretical and fundamental investigations of spray deposition include the analysis of droplet characteristics and their impingement on various surfaces, in order to analyse the droplet splashing/secondary atomization behavior [160][161][162]. Splashing of droplets is mainly determined by the features of the substrate, e.g.…”

Section: Deposition Fo the Droplets During Spray Coatingmentioning

confidence: 99%

A deep look into the spray coating process in real-time—the crucial role of x-rays

Roth

2016

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Tailoring functional thin films and coating by rapid solvent-based processes is the basis for the fabrication of large scale high-end applications in nanotechnology. Due to solvent loss of the solution or dispersion inherent in the installation of functional thin films and multilayers the spraying and drying processes are strongly governed by non-equilibrium kinetics, often passing through transient states, until the final structure is installed. Therefore, the challenge is to observe the structural build-up during these coating processes in a spatially and time-resolved manner on multiple time and length scales, from the nanostructure to macroscopic length scales. During installation, the interaction of solid-fluid interfaces and between the different layers, the flow and evaporation themselves determine the structure of the coating. Advanced x-ray scattering methods open a powerful pathway for observing the involved processes in situ, from the spray to the coating, and allow for gaining deep insight in the nanostructuring processes. This review first provides an overview over these rapidly evolving methods, with main focus on functional coatings, organic photovoltaics and organic electronics. Secondly the role and decisive advantage of x-rays is outlined. Thirdly, focusing on spray deposition as a rapidly emerging method, recent advances in investigations of spray deposition of functional materials and devices via advanced x-ray scattering methods are presented.

show abstract

Section: Deposition Fo the Droplets During Spray Coatingmentioning

confidence: 99%

A deep look into the spray coating process in real-time—the crucial role of x-rays

Roth

2016

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…This is due to the creation of high pressure regions formed by the viscosity of the gas. Sub-cavity volume percentages of drop liquid and film liquid were calculated and presented in Kuhlman et al 2014. In this paper, the simulations were done with a mesh The present thesis discusses the impact of single drops on to a static liquid film, with varying h/d ratio and Weber number.…”

Section: Motivation and Brief Literature Reviewmentioning

confidence: 99%

Comparisons of Single Drop Impact Simulations with Experiments

Medam¹

View full text Add to dashboard Cite

Comparisons of Single Drop Impact Simulations with Experiments Krishna Teja Medam As the size of electronic equipment is reduced, the ability to reject waste heat is also reduced due to smaller component surface areas, thereby affecting the component performance and finally leading to the damage of the component. Spray cooling offers a means to achieve high rates of heat transfer from microelectronic components and other high energy density devices. As a first step in investigating spray cooling, a single liquid drop impacting onto a thin liquid film was studied at isothermal conditions. 2D axisymmetric cases were simulated with ANSYS Fluent and 3D cases with OpenFOAM using the Volume of Fluid (VOF) model. The post processing of the results was performed in Surfer (Version 9) software in order to determine the liquid film thickness and then calculate the volume of the liquid under the cavity (sub-cavity liquid volume) as functions of time. These simulations agreed with the experimental data during the cavity formation phase, but did not closely match with the experiments during the refilling of the cavity in the majority of the cases. It was speculated that the discrepancies could be due to the three dimensional instabilities leading to droplet ejection from the crown during the retraction phase. These instabilities are omitted from the 2D simulations, and were not adequately resolved in the 3D simulations. For this reason, identical cases were simulated in 3D in OpenFOAM using the VOF model. The improved agreement with experiments obtained with the three dimensional simulations is discussed.

show abstract

Practical notes toward higher quality and more reliable experiments on drop and liquid surface interactions

et al. 2021

View full text Add to dashboard Cite

Liquid volume measurements in the cavity formed by single droplet impacts into a thin, static liquid film

Cited by 14 publications

References 17 publications

A deep look into the spray coating process in real-time—the crucial role of x-rays

A deep look into the spray coating process in real-time—the crucial role of x-rays

Comparisons of Single Drop Impact Simulations with Experiments

Practical notes toward higher quality and more reliable experiments on drop and liquid surface interactions

Contact Info

Product

Resources

About