Influence of rheology and micropatterns on spreading, retraction and fingering of an impacting drop

Pandian, Santhosh Kumar; Broom, Matheu; Willmott, Geoff R.

doi:10.1039/d3sm00944k

Cited by 1 publication

(1 citation statement)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, complexity arises due to the highly dynamic nature of the impact and because of the number of variable parameters involved. For example, literature in the field covers solid , and elastic , surfaces, Newtonian and non-Newtonian liquids, − and the influence of gravity . Additionally, there could be notable internal fluid motion in the droplet; , the surface might have a texture or be shaped , or have a temperature difference; , or the impact might happen at an angle to the surface. , Surface wettability can be particularly important after the droplet reaches maximum spread, and droplet impacts on uniform hydrophobic (HPB) and hydrophilic (HPL) surfaces have been widely studied. − ,,− …”

Section: Introductionmentioning

confidence: 99%

Surveying the Directional Transport of Water Droplets upon Impact on Metallic Topographic Gradients

Misiiuk,

Willmott,

Blaikie

et al. 2024

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Drop impact phenomena on raw, polished, and topography-altered gradient surfaces are investigated and presented. The main aim of this study is to demonstrate that in using a one-step industrial patterning process, it is possible to obtain metal topographical wetting gradients that can produce various desired outcomes after droplet impact. The findings could be applied to improving wind or steam turbine blades. The ranges of Weber (We) and Reynolds (Re) numbers in the study are 3−300 and 650−6500, respectively. It is demonstrated that for a fixed We, the droplet transport outcomes change from bouncing-off to sideflipping to deposition depending on the impact location and the gradient strength. The effect of We in combination with the gradient strength was also considered to demonstrate droplet behavior similar to that observed on a uniform water repellent surface and on biphilic systems. In addition, full bouncing-off and directional control have been demonstrated. For the condition We = 95 ± 3, it was possible to achieve a maximum droplet recoil height of ∼6 mm and a side motion of almost 8 mm. A combination of different outcomes (e.g., splashing on one side of a droplet and passive horizontal translation on another) was observed on the studied gradients at We > 200 due to different wetting regimes across the droplet's three-phase line.

show abstract

Section: Introductionmentioning

confidence: 99%

Surveying the Directional Transport of Water Droplets upon Impact on Metallic Topographic Gradients

Misiiuk,

Willmott,

Blaikie

et al. 2024

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

show abstract

Influence of rheology and micropatterns on spreading, retraction and fingering of an impacting drop

Abstract: Rheology and surface microstructure affect many drop impact processes, including in emerging printing and patterning applications. This study reports on experiments systematically addressing the influence of these parameters on drop...

Cited by 1 publication

References 52 publications

Surveying the Directional Transport of Water Droplets upon Impact on Metallic Topographic Gradients

Surveying the Directional Transport of Water Droplets upon Impact on Metallic Topographic Gradients

Contact Info

Product

Resources

About