Droplet spreading and temporal evolution of the droplet geometry on porous media. (a)
Paper, side view; (b) paper, top view; and (c) cloth, top view. The red dotted circles
indicate the wetted diameter of the liquid patch left after complete spreading of the
droplet, i.e., when the contact angle reaches to zero. (d-i) Temporal variation of contact
angle on paper and cloth. (d-ii) Temporal variation of wetted diameter on paper and cloth
derived from the top views. Movies depicting the temporal variation of droplet geometry on
porous surfaces, from which the data have been extracted. Multimedia view:
https://doi.org/10.1063/5.0037924.2Download video file (72.1MB, mp4) DOI: 10.1063/5.0037924.2