Physics of Fluids - Publications

Lifting a sessile oil drop from a superamphiphobic surface with an impacting one

arΧiv
Science Advances 6, 1–10 (2020)

Authors

	Olinka Johani Ramírez Soto
	Vatsal Sanjay
	Detlef Lohse
	Jonathan T. Pham
	Doris Vollmer

BibTeΧ

@article {Ramirez-Sotoeaba4330,
	author = {Ram{\'\i}rez-Soto, Olinka and Sanjay, Vatsal and Lohse, Detlef and Pham, Jonathan T. and Vollmer, Doris},
	title = {Lifting a sessile oil drop from a superamphiphobic surface with an impacting one},
	volume = {6},
	number = {34},
	elocation-id = {eaba4330}, 
	year = {2020},
	doi = {10.1126/sciadv.aba4330},
	publisher = {American Association for the Advancement of Science},
	abstract = {Colliding drops are encountered in everyday technologies and natural processes, from combustion engines and commodity sprays to raindrops and cloud formation. The outcome of a collision depends on many factors, including the impact velocity and the degree of alignment, and intrinsic properties like surface tension. Yet, little is known on binary impact dynamics of low-surface-tension drops on a low-wetting surface. We investigate the dynamics of an oil drop impacting an identical sessile drop sitting on a superamphiphobic surface. We observe five rebound scenarios, four of which do not involve coalescence. We describe two previously unexplored cases for sessile drop liftoff, resulting from drop-on-drop impact. Numerical simulations quantitatively reproduce the rebound scenarios and enable quantification of velocity profiles, energy transfer, and viscous dissipation. Our results illustrate how varying the offset from head-on alignment and the impact velocity results in controllable rebound dynamics for oil drop collisions on superamphiphobic surfaces.},
	URL = {https://advances.sciencemag.org/content/6/34/eaba4330},
	eprint = {https://advances.sciencemag.org/content/6/34/eaba4330.full.pdf},
	journal = {Science Advances}
}