FIG. 2. (ai) Representative image of a condensate drop (outlined in red) about to shed under gravity. The radius of the drop at this instant is defined as the shedding radius Rsh. (aii) The consequent frame showing the clearing of the surface due to the droplet shedding. (b) Variations of the average droplet shedding radius hRshi with the applied voltage Urms for different electrode designs, i.e., straight [Fig. 1(a-ii)] and zigzag interdigitated electrodes with different values of l [Fig. 1(a-iii)]; the black solid curve with the black triangles represents the theoretical estimates corresponding to l¼ 3000 lm obtained using Eq. (1). (c) Variations of the average shedding rate hfshi with Urms for the different electrode designs. (d) Schematic of a condensate droplet during dropwise condensation under ac-EW with zigzag interdigitated electrodes of varying l. The schematic is not to scale.
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