DROPLET IMPACT ON SHEAR-DRIVEN LIQUID FILMS

2011 ◽  
Vol 21 (10) ◽  
pp. 833-846 ◽  
Author(s):  
S. Alghoul ◽  
Carol Eastwick ◽  
D. Hann
Keyword(s):  
Liquid Films ◽  
Droplet Impact

Rupture of thin films formed during droplet impact

2009 ◽  
Vol 466 (2116) ◽  
pp. 1229-1245 ◽  
Author(s):  
Rajeev Dhiman ◽  
Sanjeev Chandra
Keyword(s):  
Impact Velocity ◽  
Liquid Films ◽  
Solid Substrate ◽  
Contact Angles ◽  
Droplet Impact ◽  
Film Rupture ◽  
Droplet Spreading ◽  
Spreading Model ◽  
Wide Range ◽  
The Impact

Rupture of liquid films formed during droplet impact on a dry solid surface was studied experimentally. Water droplets (580±70 μm) were photographed as they hit a solid substrate at high velocities (10–30 m s −1 ). Droplet–substrate wettability was varied over a wide range, from hydrophilic to superhydrophobic, by changing the material of the substrate (glass, Plexiglas, wax and alkylketene dimer). Both smooth and rough wax surfaces were tested. Photographs of impact showed that as the impact velocity increased and the film thickness decreased, films became unstable and ruptured internally through the formation of holes. However, the impact velocity at which rupture occurred was found to first decrease and then increase with the liquid–solid contact angle, with wax showing rupture at all impact velocities tested. A thermodynamic stability analysis combined with a droplet spreading model predicted the rupture behaviour by showing that films would be stable at very small or at very large contact angles, but unstable in between. Film rupture was found to be greatly promoted by surface roughness.

scholarly journals Formation and rupture of gas film of antibubble

2020 ◽  
Vol 23 (1) ◽  
pp. 91-104
Author(s):  
Lichun Bai ◽  
Jinguang Sun ◽  
Zhijie Zeng ◽  
Yuhang Ma ◽  
Lixin Bai
Keyword(s):  
Liquid Film ◽  
High Speed ◽  
Liquid Surface ◽  
Single Layer ◽  
Liquid Films ◽  
Droplet Impact ◽  
Liquid Interface ◽  
High Speed Photography ◽  
Merging Process ◽  
The Impact

The formation and rupture of gas film in the process of formation, rupture and coalescence of antibubbles were investigated by high-speed photography. It was found that a gas film will appear and wrap a droplet when the droplet hit a layer of liquid film or foam before impacting the gas-liquid interface. The gas film may survive the impact on the gas-liquid interface and act as the gas film of an antibubble. A multilayer droplet will be formed when the droplet hits through several layer of liquid films, and a multilayer antibubble will be formed when the multilayer droplet impact a gas-liquid interface or a single layer of foam on the liquid surface. The way to generate antibubbles by liquid films will undergo the formation and rupture of gas films. The coalescence of two antibubbles, which shows a similar merging process of soap bubbles, also undergo the rupture and formation of gas films. The rupture of gas film of antibubble caused by aging and impact is also discussed.

scholarly journals Inner Finger Formation During a Droplet Impact on Liquid Films

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Nuri Erdem Ersoy ◽  
David L. S. Hung ◽  
Morteza Eslamian
Keyword(s):  
Liquid Films ◽  
Droplet Impact

scholarly journals Droplet impact on flowing liquid films with inlet forcing: the splashing regime

Soft Matter ◽  
2017 ◽  
Vol 13 (41) ◽  
pp. 7473-7485 ◽  
Author(s):  
Idris T. Adebayo ◽  
Omar K. Matar
Keyword(s):  
Liquid Films ◽  
Drop Impact ◽  
Droplet Impact ◽  
Impact Dynamics ◽  
Spatial Structures ◽  
P Waves ◽  
Flowing Liquid ◽  
The Impact

Waves! Spatial structures on flowing liquid films contribute immensely to drop impact dynamics and notably alter the impact outcomes.

ATOMIZATION OF THIN LIQUID FILMS BY DROPLET IMPACT

1997 ◽  
Vol 7 (5) ◽  
pp. 531-547 ◽  
Author(s):  
Patrick V. Farrell ◽  
Marwan Al-Roub
Keyword(s):  
Liquid Films ◽  
Droplet Impact ◽  
Thin Liquid Films

scholarly journals Numerical simulation of droplet impact onto liquid films with smoothed particle hydrodynamics

2012 ◽  
Vol 61 (24) ◽  
pp. 244701
Author(s):  
Ma Li-Qiang ◽  
Liu Mou-Bin ◽  
Chang Jian-Zhong ◽  
Su Tie-Xiong ◽  
Liu Han-Tao
Keyword(s):  
Numerical Simulation ◽  
Smoothed Particle Hydrodynamics ◽  
Liquid Films ◽  
Droplet Impact ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

EFFECTS OF AIR ON SPLASHING DURING A LARGE DROPLET IMPACT: EXPERIMENTAL AND NUMERICAL INVESTIGATIONS

2006 ◽  
Vol 16 (8) ◽  
pp. 981-996 ◽  
Author(s):  
Richard A. Jepsen ◽  
Sam S. Yoon ◽  
Byron Demosthenous
Keyword(s):  
Droplet Impact ◽  
Large Droplet ◽  
Numerical Investigations
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