Abstract
Splashing is a phenomenon often observed during liquid droplet impact onto a solid surface. The threshold of splashing is known to be related to droplet size, impact velocity, and physical properties of the liquid, but the mechanisms that initiate splashing are not understood completely. In accordance with the Kelvin-Helmholtz (K-H) instability analysis, recent studies have shown that ambient gas density has a significant effect on the threshold and trajectory of splashing. In this study, the effects of droplet velocity, impact angle, and ambient gas pressure (or density) on the threshold of splashing and the motion of the ambient gas surrounding the droplet were examined. Experimental observations of splashing were carried out with a droplet of 1.7 mm in diameter, while varying droplet velocity, impact angle, and ambient pressure. An empirical correlation was derived using our and other published data to determine the threshold of splashing based on the aforementioned parameters. Also, a numerical simulation using the volume of fluid method was carried out to calculate the gas velocities surrounding the droplet during impact. The results of this model gave supportive evidence that K-H instability is a suitable instability theory that helps explain the splash phenomenon with consideration of the gas motion surrounding the droplet.
| Original language | English |
|---|---|
| Pages (from-to) | 297-310 |
| Number of pages | 14 |
| Journal | Atomization and Sprays |
| Volume | 20 |
| Issue number | 4 |
| Publication status | Published - 2010 Jun 7 |
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Keywords
- Droplet
- Impact
- Instability
- Splash
- Splash threshold
ASJC Scopus subject areas
- Chemical Engineering(all)
Cite this
Splashing phenomena during liquid droplet impact. / Liu, Jie; Vu, Henry; Yoon, Suk Goo; Jepsen, Richard A.; Aguilar, Guillermo.
In: Atomization and Sprays, Vol. 20, No. 4, 07.06.2010, p. 297-310.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Splashing phenomena during liquid droplet impact
AU - Liu, Jie
AU - Vu, Henry
AU - Yoon, Suk Goo
AU - Jepsen, Richard A.
AU - Aguilar, Guillermo
PY - 2010/6/7
Y1 - 2010/6/7
N2 - Splashing is a phenomenon often observed during liquid droplet impact onto a solid surface. The threshold of splashing is known to be related to droplet size, impact velocity, and physical properties of the liquid, but the mechanisms that initiate splashing are not understood completely. In accordance with the Kelvin-Helmholtz (K-H) instability analysis, recent studies have shown that ambient gas density has a significant effect on the threshold and trajectory of splashing. In this study, the effects of droplet velocity, impact angle, and ambient gas pressure (or density) on the threshold of splashing and the motion of the ambient gas surrounding the droplet were examined. Experimental observations of splashing were carried out with a droplet of 1.7 mm in diameter, while varying droplet velocity, impact angle, and ambient pressure. An empirical correlation was derived using our and other published data to determine the threshold of splashing based on the aforementioned parameters. Also, a numerical simulation using the volume of fluid method was carried out to calculate the gas velocities surrounding the droplet during impact. The results of this model gave supportive evidence that K-H instability is a suitable instability theory that helps explain the splash phenomenon with consideration of the gas motion surrounding the droplet.
AB - Splashing is a phenomenon often observed during liquid droplet impact onto a solid surface. The threshold of splashing is known to be related to droplet size, impact velocity, and physical properties of the liquid, but the mechanisms that initiate splashing are not understood completely. In accordance with the Kelvin-Helmholtz (K-H) instability analysis, recent studies have shown that ambient gas density has a significant effect on the threshold and trajectory of splashing. In this study, the effects of droplet velocity, impact angle, and ambient gas pressure (or density) on the threshold of splashing and the motion of the ambient gas surrounding the droplet were examined. Experimental observations of splashing were carried out with a droplet of 1.7 mm in diameter, while varying droplet velocity, impact angle, and ambient pressure. An empirical correlation was derived using our and other published data to determine the threshold of splashing based on the aforementioned parameters. Also, a numerical simulation using the volume of fluid method was carried out to calculate the gas velocities surrounding the droplet during impact. The results of this model gave supportive evidence that K-H instability is a suitable instability theory that helps explain the splash phenomenon with consideration of the gas motion surrounding the droplet.
KW - Droplet
KW - Impact
KW - Instability
KW - Splash
KW - Splash threshold
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UR - http://www.scopus.com/inward/citedby.url?scp=77952975714&partnerID=8YFLogxK
M3 - Article
VL - 20
SP - 297
EP - 310
JO - Atomization and Sprays
JF - Atomization and Sprays
SN - 1044-5110
IS - 4
ER -