Droplet splashing on thin moving films at high Weber numbers

Burzynski, David A.; Bansmer, Stephan

doi:10.1016/j.ijmultiphaseflow.2018.01.015

Cited by 48 publications

(19 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Namely, concerning the last parameter, thicker films show a behavior similar to miscible liquids, with the timescales delayed relative to thinner liquid films. Recently, Burzynski and Bansmer [25] studied the droplet splashing on a thin moving film only for high Weber number (We > 2281). They reported that the liquid film velocity affects the crown geometry considerably.…”

Section: Morphological Considerations On the Hydrodynamics Of Splashingmentioning

confidence: 99%

Insights into Single Droplet Impact Models upon Liquid Films Using Alternative Fuels for Aero-Engines

2020

View full text Add to dashboard Cite

In aero-engines, the introduction of biofuels is among the best alternatives to fossil fuels, and this change is likely to affect the impact of droplets on interposed surfaces. Under this framework, this work reviews the main morphological hydrodynamic structures occurring upon the impact of a liquid droplet on a wetted surface, using jet fuel and biofuel mixtures as alternative fuels. The experiments performed allow investigating the effect of the liquid film thickness on the dynamic behavior of single drop impact, considering the relevancy of these phenomena to the optimization of engine operating parameters. Particular emphasis is given to the occurrence of crown splash, and the morphological differences in the outcomes of drop impact depending on the impact conditions and fluid properties. The four fluids tested included pure water (as reference), 100% Jet A-1, 75%/25%, and 50%/50% mixtures of Jet A-1 and NExBTL (Neste Renewable Diesel)—with the Weber impact number between 103 and 1625; Reynolds values 1411–16,889; and dimensionless film thicknesses of δ = 0.1, 0.5, and 1. The analysis on the secondary atomization for the different fluids evidences the predominance of prompt and crown splash, and jetting for alternative fuels. Finally, besides a systematic review of empirical correlations for the transition to splash, we investigate their universality by extrapolating the validation range to evaluate their ability to predict the outcome of impact accurately. One of the correlations studied show the highest degree of universality for the current experimental conditions, despite its limitation to thin liquid films (δ=0.1).

show abstract

Section: Morphological Considerations On the Hydrodynamics Of Splashingmentioning

confidence: 99%

Insights into Single Droplet Impact Models upon Liquid Films Using Alternative Fuels for Aero-Engines

2020

View full text Add to dashboard Cite

show abstract

“…Droplet impact on the liquid film is a widespread phenomenon in the natural and industrial process, such as fuel injection, pesticide spraying, and ink-jet printing. Previous studies had shown that this complex multiphase phenomenon of a droplet impact on the liquid film is affected by many factors [1][2][3][4], including gas-liquid density ratio, gasliquid viscosity ratio, and liquid film thickness. Because of the complex evolution process of the gas-liquid interface, the dynamics of this complex multiphase phenomenon is still not clear.…”

Section: Introductionmentioning

confidence: 99%

“…However, in some cases, the liquid film moves together with the solid boundary, and the moving speed of the liquid film is even close to the same order of magnitude as the droplet impact speed. Burzynski and Bansmer [3] indicated that the droplet impacts on moving film are different from that of on a stationary film. Later, the researchers made different experimental studies on the droplet impact on a moving liquid film.…”

Section: Introductionmentioning

confidence: 99%

Droplet Impact on a Moving Thin Film with Pseudopotential Lattice Boltzmann Method

Yuan

et al. 2020

Mathematical Problems in Engineering

View full text Add to dashboard Cite

The pseudopotential lattice Boltzmann method (LBM) with a tunable surface tension term is applied to study a droplet impact on a moving thin film. The Re effects of dimensionless parameters on the upstream and downstream crown evolution are studied, including Reynolds number (Re), Weber number (We), liquid film thickness, and horizontal velocity of the liquid film. The movement of the liquid film causes the asymmetry development of the upstream and downstream crown. Both the instability of upstream and downstream crowns increases with the increase of Re and We, and the upstream crown becomes more prone to break up. And a critical value of film thickness exists with the height of the upstream and downstream liquid crowns reaches the maximum value. And the velocity of liquid film restrains the development of the height of the upstream and downstream crowns, but it promotes the growth of the crown radius.

show abstract

“…The SDM described that liquid was stretched into thin liquid sheets, and then agglomerated and broken into small droplets caused by the velocity difference between the liquid sheet and adjacent gas. [21][22][23] The LDM described that liquid elements were stretched into ligaments, and then broken into droplets including mother droplets and a chain of daughter droplets, which was similar to that in other rotating devices. [24][25][26] higher viscosity more likely existed as ligament-droplet.…”

Section: Solution Strategymentioning

confidence: 88%

Liquid jet impaction on the single‐layer stainless steel wire mesh in a rotating packed bed reactor

Liu

et al. 2019

AIChE Journal

View full text Add to dashboard Cite

Liquid flow behaviors in the packing zone of a rotating packed bed reactor significantly affect the mass transfer performance. However, the interaction between the rotating packing and liquid is still not clear, due to packing's complex structure. In this work, liquid jet impaction on a rotating single-layer wire mesh was investigated to clarify the interaction and liquid flow behaviors after the impaction was observed and analyzed by visualization and simulation methods. Visual experiments showed that the interaction could be divided into the shearing action generated by vertical fibers and carrying action generated by horizontal fibers of wire mesh. A dimensionless number β was introduced as a criterion to evaluate the influence of these actions on the liquid dispersion. Simulation results agreed well with the experimental results of liquid dispersion. Dynamic liquid film behaviors on the fiber surface were further simulated and the average film thickness was 21-32 μm.

show abstract

Droplet splashing on thin moving films at high Weber numbers

Cited by 48 publications

References 29 publications

Insights into Single Droplet Impact Models upon Liquid Films Using Alternative Fuels for Aero-Engines

Insights into Single Droplet Impact Models upon Liquid Films Using Alternative Fuels for Aero-Engines

Droplet Impact on a Moving Thin Film with Pseudopotential Lattice Boltzmann Method

Liquid jet impaction on the single‐layer stainless steel wire mesh in a rotating packed bed reactor

Contact Info

Product

Resources

About