Figure 2
From: Sessile multidroplets and salt droplets under high tangential electric fields
(a–l) Side-view thermographic pictures of two deionized water droplets (droplet volume: 2 μL, droplet separation: 7 mm) on the SR surface under a high positive voltage (the left electrode was energized and the right one grounded); (m–r) Top-view bright-field optical images: (m) corresponds to (a); (n) corresponds to (c); (o) corresponds to (f); (p) corresponds to (g); (q) corresponds to (i); (r) corresponds to (l). The arrows indicate the discharge paths. The region A with a dashed frame in (b) is the region where the maximum and average temperatures were measured. The droplet volume was 2 μL and the electrode separation was 7 mm. The droplet diameter (d) and height (h) were 1.79 mm and 0.98 mm and the contact radius (r) between the droplet and the solid surface (i.e., droplet footprint radius) was 0.89 mm.
