Bubble pinch-off and scaling during liquid drop impact on liquid pool

2012 ◽  
Vol 24 (8) ◽  
pp. 082108 ◽  
Author(s):  
Bahni Ray ◽  
Gautam Biswas ◽  
Ashutosh Sharma
Keyword(s):  
Liquid Drop ◽  
Drop Impact ◽  
Liquid Pool

Regimes during liquid drop impact on a liquid pool

2015 ◽  
Vol 768 ◽  
pp. 492-523 ◽  
Author(s):  
Bahni Ray ◽  
Gautam Biswas ◽  
Ashutosh Sharma
Keyword(s):  
Vortex Ring ◽  
Liquid Drop ◽  
Liquid Pool ◽  
Ring Formation ◽  
Gas Bubble ◽  
Jet Formation ◽  
Vortex Ring Formation ◽  
Water Drops ◽  
Regime Map ◽  
The Impact

Water drops falling on a deep pool can either coalesce to form a vortex ring or splash, depending on the impact conditions. The transition between coalescence and splashing proceeds via a number of intermediate steps, such as thick and thin jet formation and gas-bubble entrapment. We perform simulations to determine the conditions under which bubble entrapment and jet formation occur. A regime map is established for Weber numbers ranging from 50 to 300 and Froude numbers from 25 to 600. Vortex ring formation is seen for all of the regimes; it is greater for the coalescence regime and less in the case of the thin jet regime.

Studies of two-dimensional liquid-wedge impact and their relevance to liquid-drop impact problems

1985 ◽  
Vol 401 (1821) ◽  
pp. 225-249 ◽  
Keyword(s):  
High Speed ◽  
Liquid Drop ◽  
Time History ◽  
Drop Impact ◽  
High Speed Photography ◽  
Two Dimensional ◽  
Surface Geometry ◽  
Repeated Impact ◽  
Liquid Impact ◽  
The Impact

In the initial stage of liquid-drop impact, the contact region expands faster than the wave speed in the liquid. This causes compressible behaviour in the liquid, and high transient pressures. High-velocity jetting results when the wave motion in the liquid overtakes the expanding contact edge and moves up the free surface of the drop. The detailed pressure fields in this early time history of impact have been calculated by Lesser ( Proc . R . Soc . Lond . 377, 289 (1981)) for both two and three-dimensional liquid masses and for targets of finite admittance. An important result is that the edge pressures exceed the central ‘water-hammer’ pressure 3ρ 0 CU i and at the time of shock-detachment approach ca . 3ρ 0 CU i . At this stage the edge pressures, for both spherical drops and two-dimensional liquid wedges, depend only on the impact velocity and the instantaneous angle between the liquid and solid surfaces. This suggests that the essential features of the early stage of liquid impact can be usefully studied by producing impacts with two-dimensional liquid wedges, and predicted data for pressures, shock angles and velocities are presented. Experiments are described for producing impacts with preformed shapes by using water-gelatine mixtures and observing the impact events with high-speed photography. The results confirm the main features of the model and give information on edge pressures, jetting, cavitation in the liquid and the effect of the admittance of the solid. The relevance of the results to the damage and erosion of materials subjected to liquid impact is discussed. In particular, it is possible to explain the apparently low damage-threshold of some materials, the form of damage and its development with repeated impact. The study highlights the importance of the detailed surface geometry in the region of contact.

scholarly journals 1221 Liquid Drop Impact Erosion by High-Speed Water-Spray

2010 ◽  
Vol 2010.47 (0) ◽  
pp. 475-476
Author(s):  
Yasuyuki Kudo ◽  
Nobuyuki Fujisawa ◽  
Takayuki Yamagata ◽  
Fuminori Matsuura
Keyword(s):  
High Speed ◽  
Liquid Drop ◽  
Drop Impact ◽  
Water Spray ◽  
Impact Erosion

scholarly journals Oblique drop impact onto a deep liquid pool

2017 ◽  
Vol 2 (8) ◽  
Author(s):  
Marise V. Gielen ◽  
Pascal Sleutel ◽  
Jos Benschop ◽  
Michel Riepen ◽  
Victoria Voronina ◽  
...  
Keyword(s):  
Drop Impact ◽  
Liquid Pool

The regime of large bubble entrapment during a single drop impact on a liquid pool

2017 ◽  
Vol 29 (9) ◽  
pp. 092101 ◽  
Author(s):  
Hiranya Deka ◽  
Bahni Ray ◽  
Gautam Biswas ◽  
Amaresh Dalal ◽  
Pei-Hsun Tsai ◽  
...  
Keyword(s):  
Drop Impact ◽  
Liquid Pool ◽  
Large Bubble ◽  
Single Drop

CLSVOF method to study consecutive drop impact on liquid pool

2013 ◽  
Vol 23 (1) ◽  
pp. 143-158 ◽  
Author(s):  
Bahni Ray ◽  
Gautam Biswas ◽  
Ashutosh Sharma ◽  
Samuel W.J. Welch
Keyword(s):  
Drop Impact ◽  
Liquid Pool

Special phenomena from a single liquid drop impact on wetted cylindrical surfaces

2013 ◽  
Vol 51 ◽  
pp. 18-27 ◽  
Author(s):  
Gangtao Liang ◽  
Yali Guo ◽  
Yong Yang ◽  
Song Guo ◽  
Shengqiang Shen
Keyword(s):  
Liquid Drop ◽  
Drop Impact
Sign in / Sign up

Export Citation Format

Share Document