Fig. 2.

Drop velocity. (A) Velocity $V$ of a drop of silicone oil ($R$ = 1.4 mm) gliding on a liquid-nitrogen bath, as a function of time $t$. The numbers mark the three phases of movement: acceleration, deceleration, and constant velocity. The corresponding movie is Movie S3. (B) Comparison of the velocity $V\left(t\right)$ of five identical silicone-oil drops ($R$ = 1.4 mm) deposited slightly differently on the bath. (C) Velocity $V\left(t\right)$ of ethanol (blue dots, specific heat $c_p$ = 2,400 J/kg$\cdot$K⁻¹) and silicone-oil drop (orange dots, $c_p$ = 1,600 J/kg$\cdot$K⁻¹) with similar radius ($R$ = 1.4 mm) and initial velocity. In all images, the darker lines are the numerical solution of Eq. 5, with identical prefactors $\alpha$ = $\beta$ = 15 and $\mathrm{\Delta }h$ = 1.45 $\mathrm{\mu }$m.