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Experimental and mechanistic description of merging and bouncing in head-on binary droplet collision
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10.1063/1.2841055
/content/aip/journal/jap/103/6/10.1063/1.2841055
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/6/10.1063/1.2841055
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Merging collision sequence (in regime I) near the soft transition boundary determined by computation (left) and experiment (right). Conditions: Tetradecane in air, , , , and .

Image of FIG. 2.
FIG. 2.

Bouncing collision sequence (in regime II) near the soft transition boundary determined by computation (left) and experiment (right). Conditions: Tetradecane in air, , , , and .

Image of FIG. 3.
FIG. 3.

Bouncing collision sequence (in regime II) near the hard transition boundary determined by computation (left) and experiment (right). Conditions: Tetradecane in air, , , , and .

Image of FIG. 4.
FIG. 4.

Merging collision sequence (in regime III) near the hard transition boundary determined by computation (left) and experiment (right). Conditions: Tetradecane in air, , , , and .

Image of FIG. 5.
FIG. 5.

Computed merging collision sequences near the soft transition boundary for the experimental sequence of Fig. 1 assuming slightly (a) earlier and (b) delayed merging instants, demonstrating the sensitivity of the collision event to the instant of merging.

Image of FIG. 6.
FIG. 6.

Energy components of the colliding droplets vs time near for bouncing . Legend: KE is total kinetic energy, DE is total dissipation energy, SE is surface energy of the drop, TE is total energy, and VDR is viscous dissipation rate multiplied by unit time, each normalized by the initial energy of a single droplet.

Image of FIG. 7.
FIG. 7.

Energy components of the colliding droplets vs time near for merging . Same legend as that of Fig. 6.

Image of FIG. 8.
FIG. 8.

Energy components of the colliding droplets vs time near for bouncing . Same legend as that for Fig. 6.

Image of FIG. 9.
FIG. 9.

Energy components of the colliding droplets vs time near for merging . Same legend as that for Fig. 6.

Image of FIG. 10.
FIG. 10.

Distribution of velocity vectors at (a) and (b) for the bouncing case near .

Image of FIG. 11.
FIG. 11.

Distribution of velocity vectors at (a) and (b) for the merging case near .

Image of FIG. 12.
FIG. 12.

Evolution of interdroplet gap geometry for tetradecane in air with (, , and ).

Image of FIG. 13.
FIG. 13.

Evolution of and for soft tetradecane droplet collision with merging in air for . The associated with the augmented van der Waals force are also shown, for which .

Image of FIG. 14.
FIG. 14.

Evolution of and for hard tetradecane droplet collision with merging in air for . The associated with the augmented van der Waals force are also shown, for which .

Image of FIG. 15.
FIG. 15.

Accelerating surface movement in the presence of augmented van der Waals force; (soft tetradecane droplet collision in air for ).

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/content/aip/journal/jap/103/6/10.1063/1.2841055
2008-03-17
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Experimental and mechanistic description of merging and bouncing in head-on binary droplet collision
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/6/10.1063/1.2841055
10.1063/1.2841055
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