Fig. 4
From: Capillary orbits
The effect of energy loss. a Experimental trajectory of two particles with radii R1 = 360 μm and R2 = 340 μm. See also Supplementary Movie 9. b Energy loss \(\Delta E_{{\mathrm{tot}}}\) of a two-drop system as a function of time (in blue). The modeled ΔE is plotted with a dotted line. c Trajectories of the two particles in the center of mass frame, with two different color codes for their velocities. The dotted lines are the modeled trajectories, calculated numerically by integrating (for each particle) a small friction force with magnitude \(F = \frac{{\eta _vR^2}}{h}\left( {V - v_0} \right)\) and a direction opposite to the particle velocity V
