Fig 1.
The targeted system of the present work contains two identical nanodroplets with a diameter of 8 nm.
Two droplets are put into a vacuum environment with a separated distance of 6 nm.
Fig 2.
(a) Experimental results of impacting droplet with 20 μm upon a superhydrophobic solid surface.
(b) Sequential images of impingement of a nanodroplet with diameter of 8 nm from MD simulations.
Fig 3.
(a) Impingement of binary nanodroplets with Dsep = 6 nm at We = 1.21 (b) The corresponding variation of mass center of each nanodroplet over impingement.
Fig 4.
(a) Free evolution of impingement of binary nanodroplets at We = 30.18 and (b) corresponding variation of mass center of two droplets as a function of time.
Fig 5.
Free evolution of unstable dynamics of the targeted system at (a) We = 120.8 and (b) We = 146.08.
Fig 6.
Variation of dimensionless spreading factors of targeted systems as a function of time at (a) We = 1.21 and (b) We = 30.18.
(c) The evolution ofdroplets’ collision with Dsep = 6 nm, 12 nm, and 18 nm at We = 30.18.
Fig 7.
(a) Variation of h* as a function of We at different values of Dsep.
(b) Phase diagram containing irrelevant and suppressive secondary spreading regimes with respect to Dsep and We.
Fig 8.
(a) Variation of βpri, maxand βsec, max at various Dsep as a function of We1/2Re1/5.
The free evolution of impacting binary nanodroplets at We = 77.31 under (b) Dsep = 6 nm and (c) Dsep = 18 nm. (d) The proportion of energy dissipation at We = 77.31 and Dsep = 6 nm and 18 nm.
Fig 9.
The collision of separated nanodroplets after the below droplet completely bounces off from solid surface at We = 42.65.
Fig 10.
(a) Variation of tc on superhydrophobic solid surface under different given conditions.
(b) Evolution of impacting binary droplets at We = 118.2.